California Code, Business and Professions Code - BPC § 23425

(a) Any chapter, aerie, parlor, lodge, or other local unit of an American national fraternal organization which has as the owner, lessee, or occupant thereof operated an establishment for fraternal purposes.  An American national fraternal organization as used in this subdivision shall actively operate in not less than 20 states of the Union and have not less than 175 local units in those 20 states, and shall have been in active continuous existence for not less than 20 years.

(b) Any hall or building association of a local unit mentioned in subdivision (a), all of the capital stock of which is owned by the local unit or the members thereof, and which operates the clubroom facilities of the local unit.