1. When, under the provisions of sections 347.010 to 347.187 or under the provisions of the operating agreement of a limited liability company, notice is required to be given to any person, a waiver in writing signed by that person, whether before or after the time stated in it, is equivalent to the giving of notice.
2. A person's attendance at a meeting:
(1) Waives objection to lack of notice or defective notice of the meeting, unless such person at the beginning of the meeting objects to holding the meeting or transacting business at the meeting; and
(2) Waives objection to consideration of a particular matter at the meeting that is not within the purpose or purposes described in the meeting notice, unless such person objects to considering the matter when it is presented.