At a membership meeting, the members control the meeting and not the board. If not specified in the bylaws, a quorum would be a majority of the members.
It appears that "a candidate for membership becomes a new member when 1) elected by 2/3 vote of active members of the chapter in January AND 2) pays dues and installation fees by March 1."
RONR describes a "standard" order of business. An agenda could be used when the "standard" order of business does not apply. It is a duty of the secretary to prepare an order of business to be used by the presiding officer.