California Code, Education Code - EDC § 52316

Any pupil enrolled in grade 10, 11, or 12, and who is also attending a regional occupational center or regional occupational program may be excused from attending courses in physical education by the governing board of the school district maintaining grade 10, 11, or 12, and in which the pupil is enrolled, if attendance upon such classes results in hardship because of travel time involved.

If a pupil is excused from physical education classes pursuant to this section, the minimum schoolday for him in his regular high school is 180 minutes.