188_41 interference 41. Integration of the Population (“UMO Ilinden – PIRIN”), a political party founded in 1998 and based in south-western Bulgaria (in an area known as the Pirin region or the geographic region of Pirin Macedonia). The party was declared unconstitutional by the Constitutional Court on 29 February 2000 and as a result dissolved. In a judgment of 20 October 2005 this Court found that the party’s dissolution had been in breach of its and its members’ right to freedom of association (see United Macedonian Organisation