plz explain, thx

The Ontario premier issued an executive piece of legislation that outlawed the legal recognition of Canadian patents in Ontario. The Lieutenant Governor for the Province was so incensed with what the provincial government did, she refused to give the legislation Royal Assent. Assuming that a certain technology business decided to try and rely on this and take it as a legal basis for infringing on the patent of the Waterloo-based company. What are three ways that the Waterloo company could challenge the enforceability of the legislation if it felt compelled to take the London business to court for patent infringement? (15 points)