Cal. Rev. & Tax. Code § 6363.5
There are exempted from the taxes imposed by this part the gross receipts from the sale of, and the storage, use or other consumption in this state of, meals and food products for human consumption furnished or served by any religious organization at a social or other gathering conducted by it or under its auspices, if the purpose in furnishing or serving the meals and food products is to obtain revenue for the functions and activities of the organization and the revenue obtained from furnishing or serving the meals and food products is actually used in carrying on such functions and activities.
For the purposes of this section, "religious organization" means any organization the property of which is exempt from taxation pursuant to subdivision (f) of Section 3 of Article XIII of the State Constitution.
Ca. Rev. and Tax. Code § 6363.5