The most effective way of becoming a SIPB member is to become a prospective and hang around the office helping out so much (see below) that the members forget you aren't a member and proclaim, ``WHAT? You're not a members? We'll have to fix that!''
The full, official procedure for Granting Membership is described in the By-Laws Article III section 3 amended by Section 1 of Amendment III. That document is currently available in /afs/sipb/admin/text/constitution.