The act was originally enacted in 1988 and was designed to provide a systematic approach to assess and manage chemical substances in the environment that were not addressed under existing programs. In 1990 with
SOR/90-583: Ozone-depleting Substances Regulations No. 2 (certain bromofluorocarbons) were added to the LOTS. In 1997 the
Supreme Court of Canada adjudicated the case of
R. v. Hydro-Québec, by which an attempt was made to enforce the CEPA in the matter of
poly-chlorinated biphenyls as a large quantity of said substances had been dumped into a stream by the respondent. Justices
Gérard La Forest,
Claire L'Heureux-Dubé,
Charles Gonthier,
Peter Cory and
Beverley McLachlin held that "the environment is not, as such, a subject matter of legislation under the
Constitution Act, 1867. Rather, it is a diffuse subject that cuts across many different areas of constitutional responsibility, some federal, some provincial. If a provision relating to the environment in pith and substance falls within the parameters of any power assigned to the body that enacted the legislation, then it is constitutionally valid." The fines were upheld and the CEPA was deemed valid legislation under the criminal law power. After being reviewed in the 1990s, it was replaced by the current legislation that provides new powers for health and environmental protection. It was introduced by the
26th Canadian Ministry as Bill C-32 on March 12, 1998, subsequently receiving
royal assent on September 14, 1999. The act came into force on March 31, 2000. As a Canadian statute, the act is unique for including a declaration of "primary purpose" in addition to a preamble. On April 23, 2021, the LOTS was amended by regulation to include
plastic manufactured items, in advance of the June 20, 2022, regulation for the Canadian ban on single-use plastics (SUP), which was introduced by the
Minister of Environment and Climate Change Steven Guilbeault. The act received
ENVI committee attention in 2021 because of
Volkswagen Dieselgate. As of July 2022, the act had received 13 amendments over its quarter-century existence. == New and existing substances ==