This article details the major Canadian allocations changes under NARBA.
The principal reason for Canada in entering the NARBA negotiations was to gain more clear-channel allocations for Canadian stations, particularly for the CBC, which at that time was both Canada's public broadcaster and also its broadcasting regulator.
Up to that point, these allocations had been dominated by commercial stations from the United States.
Most stations throughout North America were minimally affected by the allocations changes.
Their channels simply moved up (or in a few cases down) the dial to a new frequency which was shared (or not) with the same stations as were there before.