Serbia - 2006 Constitution

Part II - Human and Minority Rights and Freedoms (2. Human Rights and Freedoms)
Title Article 55
Article

55

[...]
Judges of Constitutional Court, judges, public prosecutors, Defender of Citizens, members of police force and military persons may not be members of political parties.

Categories - Extra-parliamentary party (Members' compatibility)
Source Source: http://www.legislationline.org/topics/country/5/topic/1 (Accessed: May 2009)