(1) The following vehicles and loads must comply with the requirements in schedule 1 (Mass and loading requirements for heavy vehicles):
(a) a heavy vehicle together with its load (if any);
(b) a heavy combination together with its load (if any).
(2) However, subsection (1) does not apply to the following:
(a) a class 1 vehicle as far as a class 1 notice or a class 1 permit exempts the vehicle from a requirement of schedule 1;
(b) a class 3 vehicle as far as a class 3 notice or a class 3 permit exempts the vehicle from a requirement of schedule 1;
(c) an eligible vehicle as far as the eligible vehicle is permitted to operate at a higher mass limit under section 46 (When eligible vehicles may operate at higher mass limits).