It is a close corporation, and its membership limit is one hundred.

Forty will answer, but if the number fall below that, there must be an election, to fill the grand quorum.
This Sanhedrin can't do anything of the slightest importance, but it can talk.

It can "discuss." That is, it can discuss "important questions relative to Church members", evidently persons who are already Church members.

This affords it amusement, and does no harm.
It can "fix the salaries of the Readers." Twice a year it "votes on" admitting candidates.

That is, for Church membership.