Germany - 1967 Party Law

Part Section One - General Provisions
Title Article 3 - Active and Passive Legitimation
Article

3

A political party may institute legal proceedings in its own name and lawsuits may be brought against it. The same applies to its local organizations at their highest level unless the party Statutes contain provisions to the contrary.

Categories - Extra-parliamentary party (Registration reqs.)
Source http://www.bgbl.de/Xaver/text.xav?bk=Bundesanzeiger_BGBl&start=%2F%2F*%5B%40attr_id%3D'bgbl167i0773.pdf'%5D&wc=1&skin=WC