CSA B51: In Ontario, TSSA does not automatically accept all of CSA B51’s definitions and positions for boilers and pressure vessels. The jurisdiction has the final authority, and can choose to accept or deny any code, or portion of code, as they deem fit. Furthermore, TSSA can also apply their own interpretation to the codes that they allow. TSSA’s Code Adoption Document (BPV-08-01), published May 1, 2008, lists what sections