Yes.
An interprovincial agreement was reached between Quebec and Ontario to enable Canadian brewers with production units in both provinces to exchange or transfer stock between their various plants. For instance, a brewer in Toronto could take its stocks brewed in Toronto and distribute them freely in Quebec and Montreal. And a Montreal brewer with a production unit in Ontario could do the same.
It allowed Quebec and Ontario brewers to generate savings through better logistics and, as a result, be in a better position to deal with the price war, not to mention dumping by foreign brewers.