1 Basis of presentation

The Consolidated Financial Statements of Eni Group have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB) and adopted by the European Union (EU) pursuant to article 6 of the EC Regulation No. 1606/2002, of the European Parliament and of the Council of July 19, 2002 and in accordance with article 9 of Legislative Decree No. 38/20051 1. Oil and natural gas exploration and production activity is accounted for in conformity with internationally accepted accounting standards. Specifically, this concerns the determination of the amortization expenses using the unit-of-production method and the recognition of the production sharing agreement and buyback contracts. The Consolidated Financial Statements have been prepared on a historical cost basis, taking into account where appropriate of any value adjustments, except for certain items that under IFRS must be recognized at fair value as described in the summary of significant accounting policies paragraph.

The 2013 Consolidated Financial Statements approved by Eni’s Board of Directors on March 17, 2014, were audited by the independent auditor Reconta Ernst & Young SpA. The independent auditor of Eni SpA, as the main auditor, is wholly in charge of the auditing activities of the Consolidated Financial Statements; when there are other independent auditors, it takes the responsibility of their work.

Amounts in the financial statements and in the notes are expressed in millions of euros (€ million).

(1) The Consolidated Financial Statements are compliant with IFRSs as issued by the IASB and effective for the year 2013, except for IFRS 10 “ Consolidated Financial Statements”, IAS 27 “Separate Financial Statements”, IFRS 11 “Joint arrangements”, IAS 28 “Investments in Associates and Joint Ventures” and IFRS 12 “Disclosure of Interests in Other Entities” (see also “Recent accounting standards”). Therefore, the above mentioned standards are effective for 2013 Annual Report on Form 20-F, because, starting from 2007 Eni has been applying the SEC provisions which allow foreign private issuers that prepare their financial statements according to IFRS as issued by the IASB (even if not yet endorsed) to eliminate of the US GAAP reconciliation of net income and equity.