Jay
The rules for Qualified workers is by Provincial legislation not code. Each Province has different rules.
BC legislation is Safety Standards Act 2003 C39 Section 88 plus M58 and M59
See also the Electrical Safety Regulation 100/2004 which is the M58 referenced above.
Code is enacted by legislation which makes it law. It is possible for a province to adopt other code. Concievably the province might decide the NEC might be the preferred code. I think Alberta wants to adopt another performance based code for the oil patch.