1. Every two years from 30 June 2013, the Commission shall verify that the thresholds set out in points (a) and (b) of Article 15 correspond to the thresholds established in the World Trade Organisation Agreement on Government Procurement (GPA) and shall, where necessary, revise them in accordance with this Article.

In accordance with the calculation method set out in the GPA, the Commission shall calculate the value of those thresholds 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 thresholds thus revised shall, where necessary, be rounded down to the nearest thousand euros so as to ensure that the thresholds in force provided for by the GPA, expressed in SDRs, are observed.

2. Every two years from 1 January 2014, the Commission shall determine the values, in the national currencies of Member States, whose currency is not the euro, of the thresholds referred to in points (a) and (b) of Article 15, revised pursuant to paragraph 1 of this Article.

At the same time, the Commission shall determine the value, in the national currencies of the Member States, whose currency is not the euro, of the threshold referred to in point (c) of Article 15.