(a) Unless the bylaws provide otherwise, a quorum is present
throughout any meeting of the association if persons entitled to
cast twenty percent of the votes that may be cast for election of
the executive board are present in person or by proxy at the
beginning of the meeting.
(b) Unless the bylaws specify a larger percentage, a quorum
is deemed present throughout any meeting of the executive board
if persons entitled to cast fifty percent of the votes on that
board are present at the beginning of the meeting.