It depends. Prevailing legislation (e.g., regulations at the federal, provincial, territorial, state, regional, local, municipal, etc. level) must be followed even if the corresponding requirements within the manual are less strict. However, in some cases the manual requires something that the prevailing legislation does not, and therefore the manual must be followed.
Example – Some provinces require that one toilet is provided for every 20 employees while the manual requires one toilet for every 35 employees. Therefore, the operation must follow the regulations in their province for one in 20 if it applies to them, since the prevailing legislation is stricter.
Example – In Quebec, according to the regulations, potable water parameters allow for 10 Total Coliforms and 0 E. coli. In order to follow the manual requirements, an operation would have to follow the potable water guidelines of 0 Total Coliforms and 0 E. .coli, since the manual is stricter.
All prevailing legislation must be followed.