The frequency boundaries were reinstated on the charts at the insistence of all the regional RAPACs, not the then regulator
I don't believe it was the RAPAC's back then that caused the boundaries to go back on the charts, but a push from some other sectors of industry, including ASA/ATC. It was certainly not a hot topic at the RAPAC I was involved in. The change occurred with very little consultation and the change was not even bedded down when the lines went back on. The ongoing education seemed to fade away quite quickly, something we still see far too frequently.