Cal. Education Code § 17415

Whenever the electors of a school district, at an election held pursuant to Section 17409 or 17413, have approved an increase in the maximum tax rate of the district for the purpose of enabling the district to enter into a lease or agreement for a site or building, or both, and before the lease or agreement is entered into, or during the term of the lease or agreement, territory is taken from the district and annexed to or included in another district by any means, the acquiring district shall automatically assume and shall pay to the district from which the territory is transferred a proportionate share of any remaining payments due under the lease or agreement, as the payments become due, for so long as the lease or agreement runs. The acquiring district’s proportionate share shall be in the ratio which the total assessed valuation of taxable property in the transferred territory bore to the total assessed valuation of taxable property in the whole district from which the territory is transferred for the year immediately preceding the date on which the transfer became effective for all purposes. This section shall be applicable only with respect to transfers of school district territory which become effective for all purposes after the effective date of enactment of this section, and shall be applicable whether the election under Section 17409 or 17413 occurred prior to or after the effective date of this section.