(a) Notwithstanding any other law, commencing with the 2008–09 fiscal year, the minimum schoolday for a pupil concurrently enrolled in regular secondary school classes and classes operating pursuant to a joint powers agreement that became effective before January 1, 2008, is 180 minutes. These regular secondary school classes constitute regular school classes for purposes of Section 46010.3.
(b) For a pupil described in subdivision (a), the average daily attendance shall be included as school district average daily attendance computed pursuant to Section 42238.05.
(c) For purposes of computing attendance pursuant to Section 46300 or any other law, immediate supervision and control of pupils while attending classes pursuant to a joint powers agreement described in subdivision (a) is deemed satisfied regardless of the school district employing the certificated employee providing the supervision and control, provided the school district is a party to the joint powers agreement.