Current Rules DO ADDRESS "Fixed Stations" - and the Part 90 definition may not be accurate for Part 95 purposes.
Refer to Part 95:303 under 'Definitions" -
Fixed station. A station at a fixed location that directly communicates with other fixed stations only.
95.1767 GMRS transmitting power limits.
This section contains transmitting power limits for GMRS stations. The maximum transmitting power depends on which channels are being used and the type of station.
(a ) 462/467 MHz main channels. The limits in this paragraph apply to stations transmitting on any of the 462 MHz main channels or any of the 467 MHz main channels. Each GMRS transmitter type must be capable of operating within the allowable power range. GMRS licensees are responsible for ensuring that their GMRS stations operate in compliance with these limits.
(1 ) The transmitter output power of mobile, repeater and base stations must not exceed 50 Watts.
(2 ) The transmitter output power of fixed stations must not exceed 15 Watts.
(b ) 462 MHz interstitial channels. The effective radiated power (ERP) of mobile, hand-held portable and base stations transmitting on the 462 MHz interstitial channels must not exceed 5 Watts.
(c ) 467 MHz interstitial channels. The effective radiated power (ERP) of hand-held portable units transmitting on the 467 MHz interstitial channels must not exceed 0.5 Watt. Each GMRS transmitter type capable of transmitting on these channels must be designed such that the ERP does not exceed 0.5 Watt.