The group is pursuing civil action against the Prime Minister Tuila'epa Sa'ilele Malielegaoi, various government departments and agencies, and the current and former attorney generals, Lemalu Herman Retzlaff and Aumua Ming Leung Wai, over the Land Titles Registration Act 2008.
It's challenging the constitutionality of the act, which allows the registration of customary land leases and requires the registration of all customary land in Samoa.
The group claims this violates articles 102 and 109 of the constitution.