To join MetaARPA, a candidate of SDF must be an existing ARPA member for at least 30 days. This 30 day period can be waived under certain conditions: The candidate was referred by an existing MetaARPA member The candidate can demonstrate good will and positive intent The candidate is known publically for his/her good work (i.e. Bill Gosper) If you qualify under one of the above criteria, then you can send in your initiation amount of $36 for ARPA plus the first year of MetaARPA dues $36 via the means listed on the 'join' link above. If you are unsure, you can always join ARPA first along with a request for the waiver.