R. v. Hauser
,  1 S.C.R. 984 is a leading Constitutional
decision of the Supreme Court of Canada
, where, In a four to three decision, the Court upheld the federal Narcotic Control Act
as constitutional under the peace, order and good government
power. The case is a particularly unusual as the Act had previously held to be constitutional under the Criminal law power in the decision of Industrial Acceptance Corp. v. The Queen
 2 S.C.R. 273.
Pigeon J., writing for the majority, held that the matter of law had sufficient "newnewss" to fall under the p.o.g.g. power, stating that:
- ...the most important consideration for classifying the Narcotic Control Act as legislation enacted under the general residual federal power, is that this is essentially legislation adopted to deal with a genuinely new problem which did not exist at the time of Confederation and clearly cannot be put in the class of "Matters of a merely local or private nature".