Article 3 4

4.   The annual transaction values referred to in paragraphs 2 and 3 shall be calculated on a yearly basis, commencing on 1 January and ending on 31 December and shall be applied starting from 1 April of the following year. The reference period for the first calculation of such value shall commence 15 calendar months before the date of application of paragraphs 2 and 3 and shall end three calendar months before that date.