These new restrictions are for landlocked waters, and as I understand it we barely avoided such measures on the outer coasts as well.
There was a considerable movement afoot once the intended guidelines were released a couple of years ago.. the coastal requirements have been eased considerably. The original proposals would have meant that everyone cruising the BC coast would have had to go outside Vancouver Island to get enough distance from "any shore" to empty the holding tank. I think it's been eased to 3 or 5 miles now, allowing those cruising the inside passages to at least have a chance to be in compliance.
But I expect that there's more to come in this department.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)