Each activity listed in Annex I to Directive 2003/87/EC that is carried out by an operator or aircraft operator shall be labelled using the codes, where applicable, from the following reporting schemes:

1. (a)

   the common reporting format for national greenhouse gas inventory systems, as approved by the respective bodies of the United Nations Framework Convention on Climate Change;

2. (b)

   the installation's identification number in the European pollutant release and transfer register in accordance with Regulation (EC) No 166/2006 of the European Parliament and of the Council12;

3. (c)

   the activity of Annex I to Regulation (EC) No 166/2006;

4. (d)

   the NACE code in accordance with Regulation (EC) No 1893/2006 of the European Parliament and of the Council13.