Reference periods and transmission frequency
Article 6
1. The reference periods for the data specified in Annexes I and II shall be annual (January to December) or biannual (January to June and July to December). The first reference periods shall start in 2017. 2. The transmission frequency shall be: (a) annual (for the period from January to December) for data referred to in points 6(a) and 7 of Annex I and points 5(a) and 6 of Annex II; (b) biannual (for the periods from January to June and from July to December) for data referred to in point 6(b) of Annex I and point 5(b) of Annex II.