Portugal - 1976 Constitution

Part I - Fundamental Duties and Rights - II - Rights, Freedoms and Guarantees
Title Article 47
Article

47

(1) Freedom of association includes the right to establish and join political associations and parties, and, through them, to work jointly and democratically to give expression to the will of the people and to organize political power.
(2) No one shall be a member of more than one political party at the same time, or be prevented from exercising any right by reason of membership, or the termination of membership, of a lawfully constituted party.
(3) Without prejudice to the philosophy or ideology underlying their programs, political parties shall not use names that contain expressions directly connected with any religion or church, or use emblems that may be mistaken for national or religious symbols.

Amendment Constitution: Article 51 (1982)
Categories - Democratic principles (Popular sovereignty)
- Extra-parliamentary party (Organizational structure)
- Programme and identity (Religion)
- Rights and freedoms (Freedom of association)
Source Portuguese Electoral Commission (http://www.cne.pt)