Picture this – you are subcontractor who has been contracted to build, weld, and otherwise complete the structural steel component of a commercial building. Your team finishes the welding – only to realize afterward that none of the workers were certified by the Canadian Welding Bureau (“CWB”), nor were they supervised by someone who was. You submit your invoice to the general contractor or the owner, but payment is refused due to "deficiencies." Can you still enforce your right to payment?
According to the common law in Ontario, the short answer is unlikely.