In Canada, appeals by the judiciary to community standards and the public interest are the ultimate determinants of which forms of expression may legally be published, broadcast, or otherwise publicly disseminated. Other public organisations with the authority to censor include the Canadian Human Rights Commission, various provincial human rights commissions, and the Canadian Radio-television and Telecommunications Commission, along with self-policing associations of private corporations such as the Canadian Association of Broadcasters and the Canadian Broadcast Standards Council.
Over the 20th century, legal standards for censorship in Canada shifted from a "strong state-centred practice", intended to protect the community from perceived social degradation, to a more decentralised form of censorship often instigated by societal groups invoking state support to restrict the public expression of political and ideological opponents. Canada is believed to have more hate crime legislation than any other country in the world.
The demolition of the Corridart exhibit in Montreal by former mayor Jean Drapeau on the 13 June 1976, two days before the commencement of the Montreal Olympic Games, was considered an act of censorship by the artists involved and resulted in a lengthy court trial wherein the artistic and aesthetic merit of the project was questioned. The collaborative efforts of a significant portion of the Montreal arts community was ordered destroyed by the mayor and was done so by municipal workers with police escort. The 16 main installations and dozens of smaller installations were taken to a municipal impound lot, in some cases left outside to be destroyed by the elements. The actions of the mayor were condemned by the provincial cultural affairs minister, principally because the mayor lacked legal authority over the Olympics as a whole. Corridart was intended to showcase Canadian and Montreal arts to an international audience.