Cal. Educ. Code § 52572

The governing board of a school district or the county superintendent of schools authorized by this article to establish special classes for adults designed to serve the educational needs of adults with disabilities may contract to provide those classes by any adjacent high school district or unified school district, subject to the approval of the Superintendent. Any contract entered into pursuant to this section shall be for a term of not to exceed one year but may be renewed or revised and renewed annually.