California Code, Education Code - EDC § 44263

A teacher licensed pursuant to the provisions of this article may be assigned, with his or her consent, to teach a single subject class in which he or she has 18 semester hours of coursework or nine semester hours of upper division or graduate coursework or a multiple subject class if he or she holds at least 60 semester hours equally distributed among the 10 areas of a diversified major set forth in Section 44314. A three-semester-unit variance in any of the required 10 areas may be allowed. The governing board of the school district by resolution shall provide specific authorization for the assignment. The authorization of the governing board shall remain valid for one year and may be renewed annually.