Okla. Stat. tit. 36, § 2701.1

Any incorporated society, order or supreme lodge, without capital stock, including one exempted under paragraph 2 of subsection A of Section 38 of this act, whether incorporated or not, conducted solely for the benefit of its members and their beneficiaries and not for profit, operated on a lodge system with ritualistic form of work, having a representative form of government, and which provides benefits in accordance with this act, is hereby declared to be a fraternal benefit society.