Portugal - 1997 Constitution

Part 1 - Fundamental Rights and Duties - II - Rights, Freedoms and Guarantees
Title Article 51
Chapter II - Rights, Freedoms and Guarantees of Political Participation
Article

51

(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.
(4) No party shall be established with a name or stated aims that indicate a regional connection or field of action.
(5) Political parties must be governed by the principles of transparency, democratic organization and management and the participation of all of its members.
(6) The law shall lay down regulations on the financing of political parties, specifically in relation to the requirements and limits of public funding, as well as requirements of publicity relating to their property and accounts.

Amendment Constitution: Article 51 (1989)
Categories - Programme and identity (Nationalism/Regionalism)
Source Portuguese Electoral Commission (http://www.cne.pt)