1. Every two years from 30 June 2013, the Commission shall verify that the threshold set out in Article 8(1) corresponds to the threshold established in the World Trade Organisation Agreement on Government Procurement (the 'GPA') for works concessions and shall, where necessary, revise that threshold in accordance with this Article.

In accordance with the calculation method set out in the GPA, the Commission shall calculate the value of the threshold on the basis of the average daily value of the euro in terms of the special drawing rights (SDRs), over a period of 24 months terminating on 31 August preceding the revision with effect from 1 January. The value of the threshold thus revised shall, where necessary, be rounded down to the nearest thousand euros so as to ensure that the threshold in force provided for by the GPA, expressed in SDRs, is observed.

2. Every two years from 1 January 2014, the Commission shall determine the values, in the national currencies of the Member States whose currency is not the euro, of the threshold referred to in Article 8(1), revised pursuant to paragraph 1 of this Article.

In accordance with the calculation method set out in the GPA, the determination of such values shall be based on the average daily values of those currencies corresponding to the applicable threshold expressed in euro over the 24 months terminating on 31 August preceding the revision with effect from 1 January.