2008/59/EC: Commission Decision of 18 December 2007 adjusting the weightings applicable from 1 August , 1 September , 1 October , 1 November and 1 December 2006 and from 1 January 2007 to the remuneration of officials, temporary staff and contract staff of the European Communities serving in third countries and of certain officials remaining in post in the two new Member States for a maximum period of nineteen months after the accession of the two new Member States