Waiver of Notice of Lapse of Time. a. Except as provided in the partnership agreement, notice of a meeting need not be given to any limited partner who signs a waiver of notice, in person or by an attorney-in-fact, whether before or after the meeting. The attendance of any limited partner at a meeting, in person or by an attorney-in-fact, without protesting prior to the conclusion of the meeting the lack of notice of the meeting, shall constitute a waiver of notice by him.
b. Except as provided in the partnership agreement, whenever limited partners are authorized to take any action after the lapse of a prescribed period of time, the action may be taken without the lapse if the requirement is waived in writing in person or by an attorney-in-fact, before or after the taking of the action, by every limited partner entitled to vote thereon as of the date of the taking of such action.