2. In that part of Québec west of the meridian of sixty-three degrees west longitude, official time shall be Eastern Standard Time, namely five hours behind Greenwich mean time.
Nevertheless, between two hours of the first Sunday in April and the same hour on the last Sunday of October, official time in such part of Québec shall be Eastern Daylight Saving Time, namely four hours behind Greenwich mean time.
1966, c. 3, s. 2; 1969, c. 10, s. 2; 1986, c. 107, s. 1.