GAS TRANSMISSION TARIFFS YEAR 2013 1 st JANUARY 2014 31 st DECEMBER 2014

GAS TRANSMISSION TARIFFS YEAR 2013 1 st JANUARY 2014 31 st DECEMBER 2014 Gas transmission tariffs have been calculated according to the provisions of the Delibera 514/2013/R/GAS published on 14 rd November 2013 by the Authority for Electricity and Gas. Gas transmission tariff for firm service on annual basis The gas transmission tariff T for firm service on annual basis is defined by the following formula: where: T = (Ke * CPe) + (Ku * CPu) + (Kr * CRr) + (V * CV); - Ke is the capacity booked by the user at entry point e of the national transmission network, expressed in Sm 3 /d; - CPe is the capacity charge for the national transmission service related to the capacity booked at entry point e of the national transmission network, expressed in Euro/y/ Sm 3 /d; - Ku is the capacity booked by the user at exit point u of the national transmission network, expressed in Sm 3 /d; - CPu is the capacity charge for the national transmission service related to the capacity booked at exit point u of the national transmission network, expressed in Euro/y/ Sm 3 /d; - Kr is the capacity booked by the user at redelivery point r of the regional transmission network, expressed in Sm 3 /d; - CRr is the national capacity charge for the regional transmission service related to the capacity booked at redelivery point r of the regional transmission network, expressed in Euro/y/ Sm 3 /d; - V is the gas quantity injected into the network, expressed in m 3 ; - CV is the commodity charge, expressed in Euro/m 3. The capacity charges CPe, CPu, CRr are applied to booked capacity independently from its actual utilization, while the commodity charges CV is applied to the actual gas quantities injected into the network in each of the entry point of the national transmission network, excluding entry points interconnected with storage systems. Gas transmission tariff for interruptible transmission service According to the comma 11.1 of the Annex A of Delibera ARG/gas 184/09 ( RTTG ), the interruptible transmission service is made available at entry points interconnected with foreign pipelines and it s subjected to the following charge reductions, defined on the base of cost economies associated to this type of service: - a 10% reduction of the CPe charge applies to interruptible capacity of first rank; - a 20% reduction of the CPe charge applies to interruptible capacity of second rank. The capacity charges CPu and CRr and the commodity charges CV are the same applied to firm capacity. 1

The table below shows the characteristics of the interruptible service on the basis of which the charges are applied and paid for the whole contractual period. Characteristics of the interruptible transmission service 2

The charge for the interruptible transmission service at the entry point of Vittorio Veneto, to be paid for the whole contractual period, is subject to a 10% reduction and the service is referred to an interruption in absence of a net exit physical flow at the redelivery point of Vittorio Veneto (REMI 34569001). Gas transmission tariff for firm capacity on infra-annual basis According to the comma 10.1 of RTTG, a firm transmission service is made available at entry points interconnected with foreign pipelines and with regasification terminals on semi-annual, quarterly and monthly basis. The related charges are determined by applying the coefficients shown in the following table to the CPe capacity charges proportioned on monthly basis. Multiplicative coefficients of the charge CPe Yearly 1 Six-month 1,1 Quarterly 1,2 Monthly 1,3 Daily 1,5 3

The gas transmission tariffs for year 2014, as approved with Deliberazione 603/2013/R/GAS of the Authority for Electricity and Gas, are listed in the following tables: GAS TRANSMISSION TARIFFS 1 st JANUARY 2014-31 st DECEMBER 2014 Table 1.1 - Capacity charges for the national transmission network Cpe EURO/y/Sm3/d EURO/y/Sm3/d Mazara del Vallo 3,654026 Falconara 0,351787 Gela 3,342396 Fano 0,351787 Passo Gries 0,596218 Carassai 0,371105 T arvisio 1,053838 Cellino 0,371105 Gorizia 0,736623 Grottammare 0,335140 GNL Panigaglia 0,836394 Montecosaro 0,335140 GNL Cavarzere 0,523772 Pineto 0,335140 GNL OLT Livorno 1,066446 S. Giorgio M. 0,335140 Stoccaggi Stogit / Edison Stoccagg 0,179849 Capparuccia 0,335140 San Benedetto T. 0,335140 Casteggio 0,078143 Settefinestre/Passatempo 0,371105 Caviaga 0,078143 Fonte Filippo 0,454784 Fornovo 0,078143 Larino 0,454784 Ovanengo 0,078143 Ortona 0,454784 Piadena Ovest 0,078143 Poggiofiorito 0,454784 Pontetidone 0,078143 Reggente 0,454784 Quarto 0,078143 S. Stefano M. 0,454784 Rivolta d'adda 0,078143 Candela 0,752204 Soresina 0,078143 Roseto/T. Vulgano 0,752204 Trecate 0,078143 Torrente Tona 0,752204 Casalborsetti 0,174175 Calderasi/Monteverdese 1,351695 Collalto 0,174175 Metaponto 1,351695 Medicina 0,174175 Monte Alpi 1,351695 Montenevoso 0,174175 Pisticci A.P./ B.P. 1,351695 Muzza 0,174175 Sinni (Policoro) 1,351695 Ravenna Mare 0,174175 Crotone 1,978501 Ravenna Mare Lido Adriano 0,174175 Hera Lacinia 1,978501 Santerno 0,174175 Bronte 3,099424 Spilamberto B.P. 0,174175 Comiso 3,099424 Vittorio V. (S. Antonio) 0,174175 Gagliano 3,099424 Rubicone 0,205175 Mazara/Lippone 3,099424 Noto 3,099424 CPu EURO/a/Smc/g EURO/a/Smc/g NOC - Nord Occidentale 1,833079 Bizzarone 3,606545 NOR - Nord Orientale 1,461007 Gorizia 1,746016 CEN - Centrale 1,461007 Rep. San Marino 3,192654 SOR - Centro-sud Orientale 1,208765 Passo Gries 2,131777 SOC - Centro-sud Occidentale 1,088934 Tarvisio 0,717223 MER - Meridionale 0,836692 Stoccaggi Stogit / Edison Stocca 0,418551 Table 1.2 - National capacity charge for the regional transmission network CRr national CRr CR D EURO/y/Sm3/d 1,170225 CRr/2+D/15*CRr/2 were 0<D<15 Table 1.3 - Commodity charges CV CV EURO/Sm3 0,003593 4

The percentages to cover own use gas, network gas losses and unaccounted for gas for year 2014, as approved with Delibera 603/2013/R/GAS of the Authority for Electricity and Gas, are listed in the following table: PERCENTAGES TO COVER OWN USE GAS, 1 st JANUARY 2014-31 ST DECEMBER 2014 Table 1.4 - Percentages to cover own use gas γfuel* Mazara del Vallo 0,319773% Carassai 0,032476% Gela 0,292502% Cellino 0,032476% Passo Gries 0,052177% Grottammare 0,032476% Tarvisio 0,092224% Montecosaro 0,032476% Gorizia 0,064464% Pineto 0,032476% GNL Panigaglia 0,073195% S. Giorgio M. 0,032476% GNL Cavarzere 0,045837% Capparuccia 0,032476% GNL OLT Livorno 0,093327% San Benedetto T. 0,032476% Casteggio 0,006839% Settefinestre/Passatempo 0,032476% Caviaga 0,006839% Fonte Filippo 0,039799% Fornovo 0,006839% Larino 0,039799% Ovanengo 0,006839% Ortona 0,039799% Piadena Ovest 0,006839% Poggiofiorito 0,039799% Pontetidone 0,006839% Reggente 0,039799% Quarto 0,006839% S. Stefano M. 0,039799% Rivolta d'adda 0,006839% Candela 0,065827% Soresina 0,006839% Roseto/T. Vulgano 0,065827% Trecate 0,006839% Torrente Tona 0,065827% Casalborsetti 0,015242% Calderasi/Monteverdese 0,118290% Collalto 0,015242% Metaponto 0,118290% Medicina 0,015242% Monte Alpi 0,118290% Montenevoso 0,015242% Pisticci A.P./ B.P. 0,118290% Muzza 0,015242% Sinni (Policoro) 0,118290% Ravenna Mare 0,015242% Crotone 0,173144% Ravenna Mare Lido Adriano 0,015242% Hera Lacinia 0,173144% Santerno 0,015242% Bronte 0,271239% Spilamberto B.P. 0,015242% Comiso 0,271239% Vittorio V. (S. Antonio) 0,015242% Gagliano 0,271239% Rubicone 0,017955% Mazara/Lippone 0,271239% Falconara 0,030786% Noto 0,271239% Fano 0,030786% * percentages applied to energy injected at the entry point of the national transmission network, not including entry points interconnected with the storage system. Table 1.5 - Percentages to cover network gas losses and unaccounted for ga γgnc* γpe* Redelivery point 0,104145% 0,107865% * percentages applied to energy withdrawal at the redelivery points of the regional transmission network. 5

TARIFF FOR METERING SERVICE YEAR 2014 1 st JANUARY 31 st DECEMBER 2014 The tariff for metering service has been calculated according to the provisions of the Delibera 514/2013/R/GAS published on 14 rd November 2013 by the Authority for Electricity and Gas. Tariffs for Metering Service for year 2014 The tariff for metering service TM for gas transmission service on annual basis is defined by the following formula: where: TM = Kr * CM T ; - Kr is the capacity booked by the user at redelivery point r of the regional transmission network, expressed in Sm 3 /d; - CM T is the transitory charge for metering service, according to the comma 2.1 of the Delibera 514/2013/R/GAS, for the year 2014, related to the capacity booked at redelivery point r of the regional transmission network, expressed in Euro/y/ Sm 3 /d; The transitory charge CM T for year 2013, as approved with Delibera 603/2013/R/GAS of the Authority for Electricity and Gas, is listed in the following table: GAS METERING TARIFF 1 st JANUARY 2014-31 st DECEMBER 2014 TabLe 1.6 Transitory charge for metering service CM T EURO/y/Sm 3 /d CM T 0,068464 6

NUMERICAL MODEL A shipper has to supply a customer in Milan, with a consumption equal to 2,7 million cubic meter (38,1 MJ/Sm 3 ). The quantities are delivered at the entry point of Tarvisio and re-delivered at the Redelivery point of Milan. For this scope the shipper shall ask the following booking capacities: Entry point of Tarvisio = 8.000 Sm 3 /d Entry point of Hub storage = 2.000 Sm 3 /d Exit point = 10.000 Sm 3 /d Exit point of Hub storage = 1.000 Sm 3 /d Redelivery point of Milan = 10.000 Sm 3 /d The charge for transportation capacity is calculated as shown in the following example: Capacity charges for the national transmission network (see tab1.1) see Database Municipalities - Withdrawal Areas Entry Point TARVISIO HUB Storage. Exit point (homogeneous area) NOR - Nord Orientale HUB Storage. Rate CAPACITY Capacity booked Sm 3 /d 8.000 2.000 Capacity booked Sm 3 /d 10.000 1.000 RNG CPe Euro/y/Sm 3 /d 1,053838 0,179849 CPu Euro/y/Sm 3 /d 1,461007 0,418551 Euro Charge Euro 8.430,704 359,698 + Charge Euro 14.610,070 418,551 = 23.819,023 Capacity charges for the regional transmission network (see tab1.2) + Redelivery Point MILAN Rate Distance from RNG km >15 (see database Redelivery points) CAPACITY Capacity booked Sm 3 /d 10.000 RRG CRr Euro/y/Sm 3 /d 1,170225 Euro Charge Euro 11.702,250 11.702,250 Unit Commodity Charge (see tab1.3) + VOLUME Volume per year m 3 2.700.000 Amount to cover Rate AC+Pe+GNC m 3 8.197 Commodity m 3 2.691.803 CV Euro/m 3 0,003593 Euro Charge Euro 9.671,648 9.671,648 Transmission charges del. 514/2013/R/GAS and del. 603/2013/R/GAS = TOTAL Euro 45.192,921 Metering Charge + Redelivery Point MILAN Booking capacity Sm 3 /d 10.000 Rate metering CM T Euro/y/Sm 3 /d 0,068464 Euro Euro 684,640 684,640 Transmission charges and Metering Charge del. 514/2013/R/GAS and del 603/2013/R/GAS = TOTAL Euro 45.877,561 7

Own use gas, network gas losses and unaccounted for gas OWN USE GAS Own use gas rate Energy injected GJ 102.870 GJ Percentage at Entry - Tarvi % 0,092224 95 Own use gas rate GJ 95 Network gas losses Network gas losses rate Energy withdrawal GJ 102.558 GJ Percentage % 0,107865 111 Network gas losses rate GJ 111 GNC GNC rate Energy withdrawal GJ 102.558 GJ Percentage % 0,104145 107 GNC rate GJ 107 + + = TOTALE GJ 312 8