HD Radio Station IDs

[Jim Hall]

Checking around the dial while in the car this morning, I got to wondering
if there has been a change in the FCC station ID requirements with the
advent of digital broadcasting. It seems stations "do their own thing" in
how they identify their digital stations. Some examples:

"WBZ...WBZ-HD...Boston"	
Straight and to the point.

"WTKK...WTKK-HD1....Boston"	
Aside from the alternating whispering female voices, still straight and to
the point.

"WXKS-FM Medford/Boston in crystal clear digital sound".	
ClearChannel is one of the supporters of HD, but they never mention "HD".

"WZID-FM...WZID-HD1...Manchester, Nashua, and Concord."		
Did the analog station change its call letters recently from WZID to
WZID-FM??