Cal. Rev. & Tax. Code § 214.6
(a)
(1) Property that is owned by an organization meeting the requirements of subdivision (b) of Section 4 of Article XIII of the California Constitution and complying with the requirements of paragraphs (1) to (7), inclusive, of subdivision (a) of Section 214 and that is leased to an exempt governmental entity for the purpose of conducting an activity that if conducted by the owner would qualify the property for an exemption, or leased to a public school, community college, state college, or state university, including the University of California, for educational purposes, shall be deemed to be within the exemption provided for in subdivision (b) of Section 4 of Article XIII of the California Constitution if:
(b) To claim the welfare exemption provided by this section for property leased by a church to a public school, community college, state college, or state university, including the University of California, when both entities use the property in a joint manner, and where the church has claimed a religious exemption, the church need only annually file a church lessor’s exemption claim and affirm each of the following: