(a) Except as otherwise provided in this part, a majority of the members of the council then in office shall constitute a quorum for the transaction of business. No vacancy on the council shall impair the right of the quorum to exercise the powers and perform the duties of the council. The vote of a majority of the members of the council present at the time of the vote, if a quorum is present at such time, shall be the act of the council unless the vote of a greater number is required by law or by the bylaws of the council.

(b) The chairperson may designate from among the members of the council one or more committees, each consisting of two or more members of the council, which shall have and exercise such authority as the council may delegate to it under such procedures as the council may provide by resolution establishing such committee or committees.