The governing board of a school district maintaining a high school or high schools, a county superintendent of schools, and the California Youth Authority and State Department of Education in providing programs of high school education, may prescribe regulations determining who can profit by and who shall receive instruction in automobile driver training; provided, however, that no pupil shall be permitted to enroll in automobile driver training unless such pupil is presently enrolled in a course of instruction in automobile driver education, or has satisfactorily completed such course. The regulations shall be subject to such standards for driver education and driver training as may be prescribed by the State Board of Education. Where driver training is provided, such course of instruction shall be given in one or more of the grades 9, 10, 11, or 12. Pupils shall be at least 15 years and six months of age at the time of completion of a driver training course.