142(2)Subject to subsection (5.1), a municipality may, by by-law, designate parts of highways within its bounds and under its jurisdiction that are in the vicinity of public or private schools as school zones, and may prescribe for those parts of highways a higher rate of maximum speed than the rate of speed prescribed in paragraph 140.1(1)(
a) for those highways and the rate of speed shall be in effect during the hours of 7:30 a.m. to 4:00 p.m. on the days during which a public school or private school in the vicinity of that school zone is in session.