Attendance of a person at a meeting shall constitute a waiver of notice of and presence at the meeting, except when the person objects, at the beginning of the meeting, to the transaction of any business because the meeting is not lawfully called or convened and except that attendance at a meeting is not a waiver of any right to object to the consideration of matters required by this division to be included in the notice but not so included, if the objection is expressly made at the meeting. Neither the business to be transacted at nor the purpose of any regular or special meeting of shareholders need be specified in any written waiver of notice, consent to the holding of the meeting or approval of the minutes thereof, unless otherwise provided in the articles or bylaws, except as provided in subdivision (f).
Ca. Corp. Code § 601