3. This Act does not prevent a local municipality from adopting safety standards stricter than those set out in the regulation made under section 1, provided they are not incompatible with them.
A municipal by-law containing a standard that is less strict than the standard set by the regulation made under section 1 is deemed to have been amended, and the standard set out in the by-law is deemed to have been replaced by the standard set by the regulation made under section 1.