California Code
CHAPTER 1 - General Provisions
Section 369.5.

369.5. (a) A partnership or other unincorporated association, whether organized for profit or not, may sue and be sued in the name it has assumed or by which it is known.

(b) A member of the partnership or other unincorporated association may be joined as a party in an action against the unincorporated association. If service of process is made on the member as an individual, whether or not the member is also served as a person upon whom service is made on behalf of the unincorporated association, a judgment against the member based on the member’s personal liability may be obtained in the action, whether the liability is joint, joint and several, or several.

(Added by Stats. 1992, Ch. 178, Sec. 13. Effective January 1, 1993.)