Regulation 17 was a regulation of the Government of Ontario, Canada, designed to limit instruction in French-language Catholic separate schools. The regulation was written by the Ministry of Education and was issued in July 1912 by the Conservative government of premier Sir James P. Whitney. It forbade teaching French beyond grade two in all separate schools.

The Progressive Conservative Party of Ontario, often shortened to the Ontario PC Party or simply the PCs, colloquially known as the Tories, is a centre to centre-right political party in Ontario, Canada.