Regular Membership is open to any person who submits an ancestral lineage chart which, to the satisfaction of the Chairman of the Genealogical Committee, shows that person to be a descendant of an Hispanic person or Hispanic persons who arrived in Alta California prior to the Treaty of Guadalupe Hidalgo, February 2, 1848. The spouse of a Regular Member, upon payment of dues, may join as a Regular Member. A person under the age of eighteen who submits a satisfactory ancestral lineage chart qualifies for a Junior Membership.
An applicant who claims such descent, but is unable to furnish an ancestral lineage chart which meets approval, may become a Provisional Member for one year. The Provisional Membership is renewable for a second year with the approval of the Chairman of the Genealogical Committee.