1. For the period from 1 January 2012 to 31 December 2012, the total quantity of allowances to be allocated to aircraft operators shall be equivalent to 97 % of the historical aviation emissions.
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3. The Commission shall review the total quantity of allowances to be allocated to aircraft operators in accordance with Article 30(4).
3a. Any allocation of allowances for aviation activities to and from aerodromes located in countries outside the European Economic Area ("EEA") after 31 December 2023 shall be subject to the review referred to in Article 28b.
4. By 2 August 2009, the Commission shall decide on the historical aviation emissions, based on best available data, including estimates based on actual traffic information. That decision shall be considered within the Committee referred to in Article 23(1).
5. The Commission shall determine the total quantity of allowances to be allocated in respect of aircraft operators for the year 2024 on the basis of the total allocat
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