There are also much more stringent requirements that Transport Canada and marine safety have now put on the towing of vessels as a result of many of the sorts of towing incidents that have occurred over the last number of years with the MV Miner, the MV Lyubov Orlova, and those types of incidents. Transport Canada marine safety inspectors have much more stringent criteria that are applied to a tow.
On February 5th, 2018. See this statement in context.