Whenever any notice is required to be given under the provisions of this Part or under the provisions of the articles of incorporation or by-laws of a cooperative, waiver thereof in writing, signed by the person or persons entitled to such notice, whether before or after the time fixed for the giving of such notice, shall be deemed equivalent to such notice. If a person or persons entitled to notice of a meeting attends such meeting, such attendance shall constitute a waiver of notice of the meeting, except in case the attendance is for the express purpose of objecting to the transaction of any business because the meeting has not been lawfully called or convened.
La. Corporations and Associations § 12:424