Cal. Unemp. Ins. Code § 1241
(b) To the extent permitted by federal law, any entity or organization which has made a bona fide claim that it is a church or convention or association of churches, or an organization which is operated primarily for religious purposes and which is operated, supervised, controlled, or principally supported by a church or convention or association of churches, may bring suit to challenge a decision of the appeals board denying an exemption as a church or religious organization by paying the amount of the last quarter assessed immediately preceding the initial appeals board decision denying the exemption and then making a claim for refund or credit pursuant to this section.
An entity or organization shall be deemed to have made a bona fide claim that it is a church or religious entity for purposes of this section if either of the following is established: