(a)
(1)No pupil in a kindergarten shall be kept in school in any day more than four hours exclusive of recesses except for pupils in Early Primary Programs, as set forth in Chapter 8 (commencing with Section 8970) of Part 6.
(2)
A pupil in a kindergarten in a school operating on a program of multitrack year-round scheduling pursuant to subdivision (a) of Section 37670 may be kept in school on any day for 265 minutes of instruction, exclusive of recesses.
(b)
This section shall not apply to the Pasadena Unified School District or counties of the third class as determined pursuant to Section 28024 of the Government Code, as it read on January 1, 1977.
(c)
This section shall not apply to the San Bernardino Unified School District with regard to any pupil of that district who is determined by the principal of the school in which that pupil is enrolled, pursuant to testing, teacher recommendation, or both, to be developmentally and academically suited for the longer instructional day.