http://www.calgary.ca/CA/fs/Pages/Pr...l-Support.aspx
Can I direct my property taxes toward a separate school board, rather than a public board?
If you are of the same religion as the separate school district in your area, you must direct your education taxes to the separate school board. In Calgary, Roman Catholic property owners must declare their faith as Roman Catholic in order for their education taxes to be directed to the Calgary Roman Catholic Separate School Division No. 1.