Your right to the Exemption from religion "Classes and Programs" in Ontario Catholic high schools is covered by this section in the current Ontario Education Act...
42 (13) ...no person who...attends a secondary school operated by a
Roman Catholic board shall be required to take part in any program orcourse of study in religious education on written application to the
Board of the parent or guardian of the person.
Click here to read the complete description of the Exemption clause:
www.Ontario.Education.Act
When the Ontario Government agreed to extend public funding to the high school grades in the 80's, the exemption was written into law for any student choosing to attending a local Catholic High School.