Creamy. I am looking at the origional NAS document titled "Reference Guide" that went to pilots for the system effective from 27 th Nov 2003. It's the famous blue document of 52 pages on quality paper- cost a fortune and now a collectors item!
It says. " a major change is that ....... all frequency boundary information has been removed from charts.."
It then says. " data blocks have been placed on the charts to enable pilots to make the best use of available frequencies"
It then shows a very clear diagram with four " biscuits" listing what appears on the charts.
It then says " to determine the ATC frequency and the location of the transmitter look at the frequency data block ( figure A ) "
Nothing could be clearer so what are you talking about?