Such laws must have some real relation to the objects named in them, in order to be upheld as valid exercises of the police power of the state. (pseudolaw.com)
A constitutionally - valid exercise of the feds» criminal law power requires (1) a prohibition (partial or absolute), (2) backed by a penalty, (3) for a valid criminal purpose. (macleans.ca)
As the Supreme Court of Canada has confirmed, a law aimed at suppressing or reducing an «evil» or addressing a public concern relating to peace, order, security, morality, health, or some other similar purpose is a valid exercise of the federal government's criminal law power. (macleans.ca)