I've just updated http://wiki.apache.org/spamassassin/VotingProcedure to fix a bug -- looks like we were reading the ASF pages wrongly. quoting the fixed version:
For code modifications, patches, and R-T-C changes to svn, committers have the binding votes. However, for "ready to release" and project-procedural ASF votes, votes must come from PMC members to be considered binding. (Note: previously committers could vote for releases, but this has had to be changed, due to ASF regulations. While the Apache Voting page is a little unclear on the subject, discussion on the 'legal-discuss' list has made it clear that it is part of the ASF's bylaws that PMCs, and only PMCs, can direct this action.) --j.
