Surrender of allowances
Article 56
1. An operator or aircraft operator shall surrender allowances by proposing to the Union Registry to: (a) transfer a specified number of allowances from the relevant operator holding account or aircraft operator holding account into the Union Deletion Account; (b) record the number and type of transferred allowances as surrendered for the emissions of the operator's installation or the emissions of the aircraft operator in the current period. 2. The central administrator shall ensure that the Union Registry prevents proposal for execution of surrendering allowances that are not to be taken into account for the calculation of the compliance status figure pursuant to Article 33(1). 3. An allowance that was already surrendered may not be surrendered again. 4. Where an agreement is in force in accordance with Article 25 of Directive 2003/87/EC, paragraphs 1, 2 and 3 of this Article shall apply to units issued under the greenhouse gas emissions trading system linked to the EU ETS. 5. Allowances which have a country code pursuant to Article 37(5) may not be surrendered.