Okla. Stat. tit. 18, § 18-441-509
Waiver of members meeting notice
WAIVER OF MEMBERS MEETING NOTICE.
(a) A member may waive notice of a members meeting before,
during, or after the meeting.
(b) A member’s participation in a members meeting is a waiver
of notice of that meeting unless the member objects to the meeting
at the beginning of the meeting or promptly upon the member’s
arrival at the meeting and does not thereafter vote for or assent to
action taken at the meeting.