...KQRR doesn't have to do a thing, as the border protections that were established over 70 years ago are no longer in effect. On AM as well as FM.
Are you sure about that, Bong? The new CFC CP in Sedro-Woolley was delayed over 3 months for co-ordination with the Canadians. Contour protection was an issue that had to be shown. When it turned out that the tower the station was to put its antenna on (still listed in the FCC register) had not, in fact, been built, the company had to re-apply for another location. That application, a minor change, also had to pass muster with the Canadians and took months to get approved.