1. The volume of any allowances covered by Chapter III of Directive 2003/87/EC to be auctioned in 2011 or 2012 and the auctioned products by means of which the allowances are to be auctioned shall be set out in Annex I to this Regulation.
2. The volume of allowances covered by Chapter III of Directive 2003/87/EC to be auctioned in 2013 and 2014 shall be the quantity of allowances determined pursuant to Articles 9 and 9a of that Directive for the calendar year concerned, less the allocation free of charge provided for in Articles 10a(7) and 11(2) of that Directive, less half of the total volume of any allowances auctioned in 2011 and 2012.
The volume of allowances covered by Chapter III of Directive 2003/87/EC to be auctioned each calendar year as from 2015 onwards shall be the quantity of allowances determined pursuant to Articles 9 and 9a of that Directive for the calendar year concerned, less the allocation free of charge provided for in Articles 10a(7) and 11(2) of that Directive.
Any quantity to be auctioned pursuant to Article 24 of Directive 2003/87/EC shall be added to the volume of allowances to be auctioned in a given calendar year, determined pursuant to the first or second subparagraphs of this paragraph.
The volume of allowances covered by Chapter III of Directive 2003/87/EC to be auctioned in the final year of each trading period shall take account of any cessation of operations of an installation pursuant to Article 10a(19) of that Directive, any adaptation of the level of free allocation pursuant to Article 10a(20) of that Directive and of allowances remaining in the reserve for new entrants provided for in Article 10a(7) of that Directive.
3. The volume of allowances covered by Chapter III of Directive 2003/87/EC to be auctioned each calendar year as from 2013 shall be based on the Commission's determination and publication pursuant to Article 10(1) of that Directive of the estimated amount of allowances to be auctioned or on the most recent amendment of the Commission's original estimate as published by 31 January of the preceding year.
Any subsequent change to the volume of allowances to be auctioned in a given calendar year shall be accounted for in the volume of allowances to be auctioned in the subsequent calendar year.
4. Without prejudice to Article 10a(7) of Directive 2003/87/EC, for any given calendar year each Member State's share of allowances to be auctioned covered by Chapter III of that Directive shall be the share determined pursuant to Article 10(2) of the same Directive, less any transitional free allocation made by that Member State pursuant to Article 10c of Directive 2003/87/EC in that calendar year, plus any allowances to be auctioned by that Member State in the same calendar year pursuant to Article 24 of that Directive.