Cal. Ed. Code § 1773
The county superintendent of schools of any county maintaining one or more emergency elementary schools may, if the county maintains a county library, enter into an agreement with the proper authorities of the county to provide school library services in each of the schools under such terms and conditions as may be agreed upon. The agreement may, among other matters, provide for the payment by the county superintendent of schools to the proper authorities for the use of the county library from the county school service fund of such money at such times as may be agreed upon. All money transferred shall be used solely by the authorities of the county library for the purchase of books and other materials as may be adopted by the county board of education and for the care and distribution of such books and other materials to the schools.
Ca. Educ. Code § 1773