1. Every two years from 30 June 2013, the Commission shall verify that the thresholds set out in points (a), (b) and (c) of Article 4 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 these 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. When carrying out the revision pursuant to paragraph 1 of this Article, the Commission shall, in addition, revise:

(a) the threshold established in point (a) of the first paragraph of Article 13 by aligning it with the revised threshold applying to public works contracts;

(b) the threshold established in point (b) of the first paragraph of Article 13 by aligning it with the revised threshold applying to public service contracts awarded by sub-central contracting authorities.