Electronic reproduction. "This document supersedes Ontario Secondary Schools, Grades 9-12: Program and Diploma Requirements, 1999 (OSS) and incorporates the policies and requirements outlined in the following policy/program memoranda: PPM No. 117, (3 )4z (BAccess to Information on Secondary School Programs and to Guidance Services Between Coterminous School Boards (3 )4y (B, April 16, 1993 ; PPM No. 127, (3 )4z (BThe Secondary School Literacy Graduation Requirement (3 )4y (B, August 7, 2009 ; PPM No. 133, (3 )4z (BMusic Certificates Accepted for Credits (3 )4y (B, January 5, 2004 ; PPM No. 134, (3 )4z (BIncrease in the Number of Locally Developed Compulsory Credit Courses (3 )4y (B, March 8, 2010 ; PPM No. 139, (3 )4z (BRevisions to Ontario Secondary Schools to Support Student Success and Learning to 18 (3 )4y (B, February 1, 2006 ; PPM No. 146, (3 )4z (BRevisions to Credit Requirements to Support Student Success and Learning to 18 (3 )4y (B, March 8, 2010"-- p. 7.