There are currently bills before the Senate and, I believe, the House that would mandate or regulate that relationship. At present it is primarily a voluntary relationship that's been built up over several years. With respect to the presidential order last year, it allowed the FDA to staff up. It increased the resources they had available to take on that proactive role.
The executive also issued investigative powers to the FDA to deal with the grey market and the price gouging that's been occurring in the U.S. as a result of this shortage. This is more a U.S. problem than a Canadian one.