Global Ratification and Elections Network (GREN), informally known as the Earth Federation Movement, is composed of organisations, whereas WCPA is composed of individuals as members.

Preparatory Committee for the 1991 World Constituent Assembly was converted into Global Ratification and Elections Network (GREN). The purposes of GREN, with the WCPA serving as organizing agent is to carry forward a global campaign for the ratification. The objective of GREN is to obtain the aid, strength and participation of many millions of people in thousands of organisations in most countries of the world to achieve the common purposes and objectives defined in Article 1 of the Constitution as compared with the relatively small membership of WCPA itself.