The U.S. wants to "eliminate" NAFTA Chapter 19; Canada and Mexico want to keep it. It's hard to find a compromise between these two positions, but I gave it a shot with this proposal:
Obviously, this won't make either side completely happy (which is why it is called a compromise), but maybe there's just enough in here for both sides that if Chapter 19 is one of the last items on the negotiating table, something along these lines could be the solution.