Mo. Rev. Stat. § 378.601: Fraternal benefit society, defined.

Any incorporated society, order or supreme lodge, without capital stock, including one exempted under the provisions of subdivision (1) of subsection 1 of section 378.640* 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 chapter, is hereby declared to be a fraternal benefit society.