We have action plans for if we get attacked by any country. It's a fact. We might not need to implement the Canadian action plan, or the Belgiun action plan, but, they are there. The gov may not have an 'official' plan to regulate, but I believe have discussed this, have some type of plan ready to go 'in case', covering how they'll tax it, FDA rules, etc. ready to discuss in congress. What do you think those lawmakers do? All they do is plan new laws and regulations. If they can successfully regulate it, to generate dollars, they'd do it in a heartbeat.
If our lawmakers actually put true thought into our laws, we would not have the feeling-based, reactionary, "WE GOTTA DO SOMETHING!" laws they have passed in the past few decades.