1. The new balancing regime – Workshop with Users New features in SRG and STG systems Workshop 20 September 2011

2. 2 Agenda  Welcome  New flows and functionalities for the User  Access to the Balancing Service  Transportation programs and Balancing  Billing  Next steps  Blank Tests  Systems Tests  Works closing

3. 3 Agenda  Welcome  New flows and functionalities for the User  Access to the Balancing Service  Transportation programs and Balancing  Billing  Next steps  Blank Tests  System Tests  Works closing

4. 4 Access to the new balancing system (1 of 2) The “Enabled User” is the User of storage and transportation services that owns flexibility resources for balancing purposes and shall be required to contribute, using its own resources, to the balancing of the system; the access requirements are as follows:  Holder of a valid and effective transport contract;  Holder of a storage contract for the modulation service, the hydrocarbon service or Legislative Decree 130/10 service (not required for balancing users);  To be authorised for access to the Virtual Trading Point;  Holder of ratings and/or guarantees in compliance with the provisions of the Network Code.

5. 5 SRG checks the requirements for access to the balancing system in order to prepare the list of Users which shall contribute (holders of storage contracts) and the list of the balancing Users (all network Users); to this end:  It determines the System's potential exposure of each user (EPSu);  It determines the maximum potential exposure in relation to the guarantees given by the User (MEPSu);  It manages the system of guarantees to cover the System's exposure of the User;  It compares the EPSu and MEPSu of each User;  It takes the necessary measures if the System is overexposed to the User. Access to the new balancing system (2 of 2)

6. 6  The EPSu or potential exposure of the System to the User is the potential debt, calculated on a daily basis, of the User with reference to the balancing service.  The EPSu is the sum of the following components:  Pfatt: due amounts billed and still not paid by the User;  Pdet: provisional due amounts calculated and still not billed to the User;  Patt: potential due amounts that may arise for the User in the three months following the valuation. EPSu [P FATT +P DET +P ATT ] P FATT Bills receivable (GME - Electricity Market Operator - items) Bills receivable (Imbalances) Credit notes receivable (Imbalances) Bills payable (GME items and/or imbalances) Credit notes payable (Imbalances) P DET Provisional due amounts receivable (GME items) Provisional due amounts receivable (Imbalances) Provisional due amounts payable (GME items) Provisional due amounts payable (Imbalances) P ATT Potential due amounts receivable (Expected Withdrawal) Potential due amounts receivable (PSV - Virtual Trading Point - Transactions) Calculation of the system's potential exposure to the User (EPSu) (1 of 5)

7. 7  Pfatt is composed of bills and credit notes, receivable and payable, relating to the economic items calculated on the PB-Gas platform and to imbalances of Users of the balancing service.  These economic items are a result of the calculation of the EPSu once they have been paid or reached maturity.  Pdet is the sum of economic items still not billed, determined on the basis of the most up-to-date transport balance; they are a sum of the following components:  Economic amounts receivable and payable relating to transactions completed on the PB-Gas platform by the User authorised by SRG and valued at the remuneration price;  Economic amounts receivable and payable relating to imbalances of the balancing User and valued at the imbalance price. Calculation of the system's potential exposure to the User (EPSu) (2 of 5)

8. 8 Patt is the potential due amount calculated as sum of the following components:  Transactions recorded at the Virtual Trading Point;  The cumulated imbalance the User may reach in the three months following the valuation, calculated using an expected withdrawal estimate. The aforementioned terms are assessed in the assumption of input by the User equal to zero and are valued at the estimated imbalance price. In order to estimate the expected withdrawal of the User, the calculation criteria will take into consideration the capacities assigned to both the entry and redelivery points appropriately re-proportioned on the basis of the average load factors of such capacities. Calculation of the system's potential exposure to the User (EPSu) (3 of 5)

9. 9  Users of the Capacity Portal will have the opportunity to check the components of their EPSu in real time in more detail. Level 1 EPSu Calculation of the system's potential exposure to the User (EPSu) (4 of 5)

10. 10 Level 2 EPSu Calculation of the system's potential exposure to the User (EPSu) (5 of 5)

11. 11  The MEPSu or maximum potential exposure of the System to the User corresponds to the maximum acceptable EPSu value, calculated on the basis of the following components:  Gmin is the guarantee the User is required to present in order to access the balancing service;  G are the guarantees actually presented in the form of security deposits, bank guarantees, rating certifications and guarantees in gas held in storage;  C are the expired invoices and not paid yet relating to the balancing service. MEPSu G MIN (guarantee required) Expected Withdrawal No. of days Estimated Imbalance Price G (Guarantees presented) Security deposits Bank guarantees Rating Gas guarantee - Edison T&S Gas guarantee - Stogit C (Expired bills - not paid) Bills receivable (GME - Electricity Market Operator - items) Bills receivable (Imbalances) Calculation of the maximum potential exposure of the system to the User (MEPSu) (1 of 6)

12. 12 The following types of guarantee may be presented:  Security deposit: the associated amount may be used to fully cover the guarantee the User is required to present;  Bank guarantee: the associated amount may be used to fully cover the guarantee the User is required to present;  Parent Company letter of guarantee: the associated amount may be used to fully cover the guarantee the User is required to present;  Credit rating: possession of a minimum credit rating required by the Network Code covers X% of the value of the guarantee the User is required to present;  Gas in stock at one or more Storage Companies. Calculation of the maximum potential exposure of the system to the User (MEPSu) (2 of 6)

13. 13 Day X of month M -1 M-1M+1 M Last day of month M -1 Determination of the Guarantee to be presented End of last adjustment of guarantee G 30 September (End of Gas Year) 31 March of next Gas Year Guarantee G validity term  The adjustment of the amount of the guarantee given must be carried out on the basis of the following timescales: Calculation of the maximum potential exposure of the system to the User (MEPSu) (3 of 6)

14. 14  Users of the Capacity Portal will have the opportunity to check the components of their MEPSu in real time in more detail. Calculation of the maximum potential exposure of the system to the User (MEPSu) (4 of 6) Level 1 MEPSu

15. 15 Calculation of the maximum potential exposure of the system to the User (MEPSu) (5 of 6) Level 2 MEPSu

16. 16 Calculation of the maximum potential exposure of the system to the User (MEPS) (6 of 6) Warning and Blocking Messages

17. 17  In order to limit the risks related to the potential exposure of the System to the Users, on each gas day the conditions which compare the EPSu and the MEPSu must be observed;  SRG, as Balancing Operator, calculates and communicates to GME on a daily basis the economic limit of the purchase offers that the User can formulate on the PB-Gas platform. Balancing Operator Actions in the event of the system's overexposure to the User (1 of 2)

18. 18  The Balancing Operator monitors the relative operational economic margins for each balancing user on a daily basis.  Based on the level of potential exposure EPSu with respect to the maximum potential exposure MEPSu:  The Capacity Portal displays to the User a warning/blocking message;  SRG sends a written notification to the User (and also to GME and Storage Companies);  SRG blocks, with immediate effect, the operations of the User in relation to capacity bookings and selling transactions on the Virtual Trading Point. Balancing Operator Actions in the event of the system's overexposure to the User (2 of 2)

19. 19 Agenda  Welcome  New flows and functionalities for the User  Access to the Balancing Service  Transportation programs and Balancing  Billing  Next steps  Blank Tests  System Tests  Works closing

20. 20 Transportation programs and Balancing Introduction  In order to ensure the daily balancing of the system, Enabled Users are required to make their storage resources available to the Balancing Operator.  The process defining the transportation programs in the new system will be characterised by:  Publication of Estimates on gas day G to provide an overview of the system status;  Renomination on gas day G to allow User to rebalance its input and withdrawal quantities;  Bids on gas day G aimed at making the storage resources available to the system.  During the Allocation and Balance phase, Enabled Users will be supplied with the outcomes of their balancing actions implemented during the transportation programs phase. The balancing process in the new system will be characterised by:  Bids Accepted, provided on gas day G+1, that has been selected to balance the system;  Position in Storage which is determined as final on gas day G+1;  Value of Imbalances (whose coverage is no longer ensured through its storage resources), provided as definitive in gas month M+1 and M+3.

21. 21 12:00 Deadline for transactions at Virtual Trading Point Deadline for gas sales on the STS system Nomination deadline 13:00 Nomination Confirmation 17:00 Re-nominations 19:00 12:0013:0017:00 User Gas Day G-1 Activity Deadline Transmission system Operator Storage Company

22. 22 Gas Day G-1 Flows and Operations Transmission system Operator Storage Company 12:0013:0017:00 12:0013:0017:0019:00 Transactions at Virtual Trading Point Gas transfers to Storage Nomination Confirmation Re-nominations Nomination Communication User

23. 23 User 12:0013:0017:0019:00 Transactions at Virtual Trading Point Gas transfers to Storage Nomination Confirmation Re-nomination Nomination Communication Gas Day G-1 Variations with respect to AS-IS Transmission system Operator Storage Company 12:0013:0017:00 Reservation for storage The reservation for storage will be assessed on the basis of: available capacities, including the interruptible capacities assigned, treatment/compression consumptions, available stocks/space at the time, any strategic gas subject to prior authorisation by the MSE (Ministry of Economic Development), any gas released by the user under guarantee to the Balancing Operator. In the event the reservation exceeds the User's availability, Storage Companies will modify the reservation, assigning a value equal to maximum availability.. Confirmed quantities will be checked again by the Storage Company on gas day G, as a result of the availability of stock data updated at the end of Gas Day G -1

24. 24 12:0013:0017:0019:00 Transactions at Trading Exchange Point Gas transfers to Storage Nomination Confirmation Re-nominations Nomination Communication Gas Day G-1 Variations with respect to AS-IS Transmission system Operator Storage Company 12:0013:0017:00 User Transportation Reservation In the event of an inconsistency between the transportation programs at storage hubs and the programme sent to the Transporter by the Storage Company, the reservation at said points will be modified, incorporating the data of the storage company. In response to cuts/inconsistencies in the reservations, the Transporter will modify the transportation programs of the User Redelivery Points, reproportioning unbalanced quantities at said points.

25. 25 Gas Day G Activity Deadline 14:00 2nd Publication of Estimates Minimum and Maximum Limits 16:00 Closing of Renomination 17:00 Re-nomination confirmation 19:00 Closing of Renomination 18:00 Re-nomination confirmation 1st Publication of Estimates Transactions at Virtual Trading Point Deadline 16:30 End of Balancing Session Offers 20:00 17:0019:00 Balancing Operator Transmission system Operator GME Storage Company User

26. 26 Gas Day G Flows and Operations 14:00 1st Publication of Estimates 16:00 17:00 Reformulation confirmation 19:00 17:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 18:00 20:00 Balancing Operator Transmission system Operator GME Storage Company 1st Publication of Estimates Re-Nomination Re-nomination confirmation 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Offer Minimum and Maximum Limits Re-nomination confirmation Balancing Session Offers User

27. 27 14:00 1st Publication of Estimates 16:00 17:00 Reformulation confirmation 19:00 17:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 18:00 20:00 Balancing Operator Transmission system Operator GME Storage Company 1st Publication of Estimates Re-Nomination Re-nomination confirmation 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Offer Minimum and Maximum Limits Re-nomination confirmation Balancing Session Offers Gas Day G Variations with respect to AS-IS User Publication Obligations The Balancing Operator will publish the information required by resolution 45/11 on its website at 14.00, and will then update it at 16.00

28. 28 User 14:00 1st Publication of Estimates 16:00 17:00 Reformulation confirmation 19:00 17:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 18:00 20:00 Balancing Operator Transmission system Operator GME Storage Company 1st Publication of Estimates Re-Nomination Re-Nomination confirmation 2nd Publication of Estimates Transactions in the Virtual Exchange Point Re-Nomination Offer Minimum and Maximum Limits Re-Nomination confirmation Balancing Session Offers Gas Day G Variations with respect to AS-IS Reformulation of Transport Programme The reformulation of the transport programme can be performed by Users, limited to Storage hubs and Redelivery Points. In the event of an inconsistency between the reformulation at storage hubs and the reformulation of the programme sent to the Transporter by the Storage Company, the reservation at said points will be modified, incorporating the data of the storage company. If the reformulated programme, also as per the previous point, is not balanced, the Transporter amends the transportation programs of the User Redelivery Points, by reproportioning unbalanced quantities at said points.

29. 29 User 14:00 1st Publication of Estimates 16:00 Reservation Reformulation 17:00 Reformulation confirmation 19:00 17:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 18:00 20:00 Balancing Operator Transmission system Operator GME Storage Company 1st Publication of Estimates Re-Nomination Re-Nomination confirmation 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Offer Minimum and Maximum Limits Re-Nomination confirmation Balancing Session Offers Gas Day G Variations with respect to AS-IS Reformulation of Storage Reservation The reformulation of the storage reservation will be subject to the same restrictions described for the reservation on Gas Day G-1 Interruptible capacities subject to formulations/reformulations of storage reservations will be confirmed on Gas Day G.

30. 30 User 14:00 1st Publication of Estimates 16:00 Reservation Reformulation 17:00 Reformulation confirmation 19:00 17:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 18:00 20:00 Balancing Operator Transmission system Operator GME Storage Company 1st Publication of Estimates Re-Nomination Re-Nomination confirmation 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Offer Minimum and Maximum Limits Re-Nomination confirmation Balancing Session Offers Gas Day G Variations with respect to AS-IS Offer Minimum and Maximum Limits The calculation, for users, of the Minimum and Maximum Limits for the Balancing Market bids to be sent to GME, is performed on the basis of: Capacity, space and available stocks after the (re)formulation of the reservation, Any gas released by the user under guarantee to the Balancing Operator Estimated treatment/compression consumption. In the transitory period, SRG will provide an estimate of the accuracy of gas in stock to be used to calculate the Minimum and Maximum Limits.

31. 31 Gas Day G New f unctionalities 14:00 1st Publication of Estimates 16:00 17:00 Reformulation confirmation 19:00 17:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 18:00 20:00 Balancing Manager GME Storage Company Re-Nomination Re-Nomination confirmation 1st Publication of Estimates 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Offer Minimum and Maximum Limits Re-Nomination confirmation Balancing Session Offers User Transmission system Operator

32. 32 EXPLANATOR Y Gas Day G Publication of Estimates - SRG website  SRG will public the estimates set forth in articles 6.4 and 6.5 of resolution 132/09 on its website: Home > Customers and Institutions > Gas Year 2010/2011 > Quantity of gas trasported By clicking on the reference month, it will be possible to display the relevant estimates in the format EXPLANATORY

33. 33 Gas Day G Programme Reformulation - Altra Web §The Reformulation of the Transport Programme may be carried out §On Regional Networks both through Protocol X12 and using the ‘Nomination’ functionality of Altra Web §On the National Network through the new Renomination functionality of Altra Web EXPLANATORY

34. 34 Gas Day G Reformulation Display - Altra Web §The Reformulation of the Transport Programme may be displayed through a new report accessible from the new Altra Web menu item 'Display Renomination' EXPLANATORY

35. 35 Gas Day G Reformulation of the reservation - Sampei §The Reformulation of the Storage Reservation may be performed through the new Sampei menu item “Inserimento Rinomine”

36. 36 Gas Day G Reformulation display - Sampei §The Reformulation of the Storage Reservation may be performed through the new Sampei menu item “Interrogazione Rinomine”

37. 37 Gas Day G+1 Activity Deadline Storage Company 10:30 Allocations to storage Offers Accepted and Remuneration Price Provisional Balance 11:30 GME User Transmission system Operator

38. 38 Gas Day G+1 Flows and Activities User 11:30 10:30 Storage Company GME Offers Accepted and Remuneration Price Allocations to Storage Provisional Balance Transmission system Operator

39. 39 11:30 10:30 Storage Company GME Offers Accepted and Remuneration Price Allocations to Storage Provisional Balance Gas Day G+1 Variations with respect to AS-IS User SRG calculates and sends to the GME the Overall System Deviation (SCS) Transmission system Operator Provisional Balance Following the communication of bids accepted in the Balancing Market to cover the imbalances of Balancing Users, SRG will calculate the Provisional Balance of the User using the following equation: I k + S k + (T k PSV + T k GNL + T k M + T k PB ) = P k + GS k + DS k where S k = represents the quantity of gas input to/withdrawn from storage, obtained as the sum of quantities of gas planned for storage SNk and quantities of storage gas SMk selected in the Balancing Market to cover the Overall System Imbalance (SCS). T k PB = represents the net balance of gas transactions concluded between the User and the Balancing Operator in the Balancing Market. DS k = represents the imbalance of the User and constitutes the result of the balancing equation.

40. 40 11:30 10:30 Storage Company GME Offers Accepted and Remuneration Price Allocations to Storage Provisional Balance Gas Day G+1 Variations with respect to AS-IS Storage Allocation The gas allocated to storage and stock of each User are calculated definitively in the report prepared on Gas Day G+1 User Transmission system Operator

41. 41 11:30 10:30 Storage Company GME Offers Accepted and Remuneration Price Allocations to Storage Provisional Balance Gas Day G+1 New Functionalities User Transmission system Operator

42. 42 Gas Day G+1 Provisional Balance - Altra Web  In order to display the Provisional Balance, a specific report will be made available on Altra Web, which can be accessed by selecting the 'Provisional Balance' item in the 'Reporting' section. EXPLANATORY

43. 43 Gas Month M+1 Activity Deadline Within the 15th working day M+1 Publication of Definitive Balance Storage Company User Transmission system Operator

44. 44 Gas Month M+1 Flows and Operations Storage Company Within the 15th working day M+1 Definitive Balance User Transmission system Operator

45. 45 Gas Month M+1 Variations with respect to AS-IS Storage Company Within the 15th working day M+1 Definitive Balance In the definitive balance, for each Balancing User, the imbalance that will determine the economic amount to be billed will be calculated User Transmission system Operator

46. 46 Gas Month M+1 New Functionalities Storage Company Within the 15th working day M+1 Definitive Balance User Transmission system Operator

47. 47 Gas Month M+1 Definitive Balance - Altra Web  In order to display the Definitive Balance, a specific report will be made available on Altra Web, which can be accessed by selecting the 'Definitive Balance' item in the 'Reporting' section. EXPLANATORY

48. 48 Gas Month M+3 Flows and operations M+3 Adjustment Balance User Storage Company Transmission system Operator

49. 49 Storage Company M+3 Adjustment Balance Gas Month M+3 Variations with respect to AS-IS Reconciliation Balance In the reconciliation balance, for each Balancing User, the term of definitive imbalance that may determine an economic amount to be adjusted will be calculated User Transmission system Operator

50. 50 Agenda  Welcome  New flows and functionalities for the User  Access to the Balancing Service  transportation programs and Balancing  Billing  Next steps  Blank Tests  System Tests  Works closing

51. 51 Billing Introduction  The quantities of gas exchanged on the Balancing Platform to cover the Network Imbalance and the Imbalances of individual Users are subject to Billing. Snam Rete Gas, as Balancing Operator (RdB):  procures balancing resources on the market and manages the settlement of bids selected on the Balancing Platform;  performs the settlement of gas items that are considered to have been exchanged with the Balancing User for the coverage of his imbalance.  The Balancing User must issue bills payable by the Balancing Operator in the following cases:  Sale of quantities of Gas on the Balancing Platform;  Positive imbalance.

52. 52 Gas Month M+1 Activity Deadline Within the 15th working day M+1 Publication of Definitive Balance User Storage Company Following availability of the Definitive Balance of Month M Issue of Balancing Service billing Transmission system Operator

53. 53 Bill Receivable Bill Payable Gas Month M+1 Flows and operations User Within the 15th working day M+1 Definitive Balance Availability of the Definitive Balance of Month M Transmission system Operator The Bills Receivable issued by the Balancing Operator to the User will contain two separate items, relating to the aforementioned economic amounts: economic amounts relating to transactions on the Balancing Platform and economic amounts for the coverage of the imbalance. The price at which the transactions on the Balancing Platform are valued is the remuneration price equal to the price of the last accepted offer. The imbalance price at which the quantities of gas are valued relating to the imbalance always coincides with the remuneration price, except where the overall system imbalance is less than 6000 GJ. In this case, the imbalance price will be the average price of the last 30 days with the exception of emergency days due to gas excess and deficiency.

54. 54 Gas Month M+1 Billing- Transactions at zero  The remuneration price calculated on the Balancing Platform is equal to € 0 (zero) in the event in which the quantities subject to the selected bids of enabled users are less than the quantity of gas (overall system imbalance) bid for sale by the Balancing Operator.  As regards said gas movements, against a tax base of zero, VAT should, in any case, be calculated in the bill (10%).  SRG will issue a specific bill to manage this particular case.  The price to value said transactions (for the purposes of calculation of VAT) is equal to the latest available value of the wholesale marketing price (CCI).

55. 55 Gas Month M+1 Billing Receivable – Billing Portal  Balancing Users will be able to view in detail the amounts of receivable bills that Snam Rete Gas, as Balancing Operator, has issued them.  In the Billing Portal, receivable bills can be selected through a dedicated and easily identifiable item.  More specifically, in the Billing Portal, two compressed files can be viewed (one for bills at a price higher than zero and the other for any bills at zero price, each containing the bill and the associated detailed attachment): PDF bill attachment - price >0 CSV support bill attachment - price >0 PDF bill attachment - price = 0 CSV support bill attachment - price =0  The CSV file will show cases when Imbalance Price is different from the Remuneration Price.

56. 56 Gas Month M+1 Billing Receivable - Billing Portal §By selecting 'Accedi', the User can download two csv files containing the details of Receivable Bills for transactions at a price above zero and for any transactions at zero price. EXPLANATORY

57. 57 Gas Month M+1 Billing Receivable - Billing Portal  Example of Bill for transactions at a price other than zero EXPLANATORY

58. 58 Gas Month M+1 Billing Receivable - Billing Portal  Example of CSV File for transactions at a price other than zero EXPLANATORY

59. 59 Gas Month M+1 Billing Payable - Billing Portal  In order to facilitate User operations during bills invoicing to the Balancing Operator (for gas sold to the system), details will be made available, on a daily basis, in a dedicated area on the Billing Portal, about the quantities of gas and the associated prices, and the total bill amount.  The User will be notified via e-mail on availability of said figures on the Billing Portal. EXPLANATORY

60. 60 Gas Month M+4 Flows and operations M+4 Adjustment of Bill Receivable M+3 Adjustment Balance Adjustment of Bill Payable Reconciliation billing will relate solely to the quantities linked to the imbalance. The quantities of gas subject to a reconciliation bill will be obtained as the difference between the imbalance determined with the reconciliation balance and the imbalance calculated with the Definitive Balance. Storage Company User Transmission system Operator

61. 61 Agenda  Welcome  New flows and functionalities for the User  Access to the Balancing Service  transportation programs and Balancing  Billing  Next steps  Blank Tests  Systems Tests  Works closing

62. 62 Blank Tests  While awaiting the availability of the definitive solution, in order to allow Balancing Users to familiarise themselves with the changes introduced by Resolution 45/11, Snam Rete Gas is preparing an application solution which will implement a subset of new functionalities  The application solution will be made available to all active Transport Users for the new 2011-2012 Gas Year  The date set for the start of Blank Tests is 3 October  The duration is expected to be roughly 15 days  The new functionalities will be accessible with the same users existing on the systems already used today (SRG website, Altra Web and Capacity Portal)  Snam Rete Gas will provide a help desk Service to support Users  Snam Rete Gas will shortly send a communication to notify the start of tests and provide operational details

63. 63 Gas Day G Blank Tests Storage Company 17:00 18:00 Key: Grey - functionalities not available Red - functionalities available 14:00 1st Publication of Estimates 16:00 17:00 Reformulation confirmation 19:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 20:00 Balancing Operator GME 1st Publication of Estimates Re-Nomination Re-Nomination confirmation 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Offer Minimum and Maximum Limits Re-Nomination confirmation Balancing Session Offers User Transmission system Operator

64. 64 Gas Day G Blank Tests Storage Company Key: Grey - functionalities not available Red - functionalities available 14:00 1st Publication of Estimates 16:00 17:00 Reformulation confirmation 19:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 20:00 Balancing Operator GME 1st Publication of Estimates Re-Nomination Re-Nomination confirmation 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Offer Minimum and Maximum Limits Re-Nomination confirmation Balancing Session Offers Publication Obligations SRG will publish the information identified by resolution n. 45/11, on its website at 14.00 and then update it at 16.00. User Transmission system Operator

65. 65 Gas Day G Blank Tests 17:00 19:00 Reformulation confirmation 18:00 Storage Company Key: Grey - functionalities not available Red - functionalities available 14:00 1 Publication of Estimates 16:00 17:00 Reformulation confirmation 19:00 2nd Publication of Estimates Transactions in the Virtual Exchange Point 16:30 19:00 20:00 Balancing Operator GME 1st Publication of Estimates Re-Nomination Re-Nomination confirmation 2nd Publication of Estimates Transactions at Virtual Trading Point Re-Nomination Reformulation Offer Minimum and Maximum Limits Re-Nomination confirmation Balancing Session Offers User Transmission system Operator Bids - Balancing Session Users can insert their purchase and sale Bids on the Balancing Platform The Bids will be verified on the basis of Minimum and Maximum Limits (GJ) and the Operating Margin (€)

66. 66 11:30 10:30 Gas Day G+1 Blank Tests - Flows and Activities Storage Company GME Offers Accepted and Remuneration Price Provisional Balance Key: Grey - functionalities not available Red - functionalities available Allocations to Storage User Transmission system Operator

67. 67 11:30 10:30 Gas Day G+1 Blank Tests - Flows and Activities Storage Company GME Offers Accepted and Remuneration Price Provisional Balance Key: Grey - functionalities not available Red - functionalities available Allocations to Storage Bids accepted on the Balancing Platform Publication of the selected bids, on the basis of the Overall System Imbalance (calculated as the difference between the Actual Measurements at the Stogit storage hub and reservations received on G-1) and the remuneration price. User The Balancing Operator calculates and sends to the GME the Overall System Deviation (SCS) Transmission system Operator

68. 68 11:30 10:30 Gas Day G+1 Blank Tests - Flows and Activities Storage Company GME Offers Accepted and Remuneration Price Provisional Balance Key: Grey - functionalities not available Red - functionalities available Allocations to Storage Publication of Provisional Balance A report containing the Provisional User Balance determined using the new equation is made available to Balancing Users. User Transmission system Operator

69. 69 Gas Day G+1 Blank Tests – Provisional Balance Report  The User can display his Provisional Balance calculated according to the new Balance Equation, through a new functionality which will be made available on Altra Web

70. 70 Agenda  Welcome  New flows and functionalities for the User  Access to the Balancing Service  transportation programs and Balancing  Billing  Next steps  Blank Tests  Systems Tests  Works closing

71. 71 Systems Tests  In compliance with resolution 81/11, the Balancing Operator, in coordination with GME and the storage companies, will organise a Systems Test to evaluate the new balancing system in which Users will operate  The date set for the start of Systems Tests is 16/11/2011  The expected duration of said Tests is 10 days.  Snam Rete Gas will provide a help desk Service to support Users  Snam Rete Gas will send a communication to notify the start of the Tests, supported by the necessary operational details