Navy-Marine Corps MARS VHF systems are the only NITA spec equipment thus far enforced. Almost all Amateur radio equipment meets the requirements for use on HF. Many MARS repeaters are still wide band, all new installations are narrowband. NTP8 (D) has the latest information, but does not say much about VHF systems. The only note is narrow band equipment is to be utilized. Existing systems will migrate to narrow band on a schedule TBA by Chief Mars.
I have a MARS VHF repeater running on narrowband in Wisconsin. The equipment I have was wide/narrow band selectable, so I chose to use it in narrowband mode. The repeater in Great Lakes Il. Is still wideband,. Hope this helps some on the confusion