Unless the condominium instruments or bylaws provide otherwise, a quorum shall be deemed present throughout any meeting of the members of the association if persons entitled to cast more than one-third of the votes are present at the beginning of the meeting. Unless the condominium instruments or bylaws specify a larger percentage, the presence of persons entitled to cast one-half of the votes of the board of directors shall constitute a quorum for the transaction of any business at any meeting of the board.