47 C.F.R. § 74.464
Frequency tolerance
For operations on frequencies above 25 MHz using authorized bandwidths up to 30 kHz, the licensee of a remote pickup broadcast station or system shall maintain the operating frequency of each station in compliance with the frequency tolerance requirements of § 90.213 of this chapter. For all other operations, the licensee of a remote pickup broadcast station or system shall maintain the operating frequency of each station in accordance with the following:
| Frequency range | Tolerance (percent) | |
|---|---|---|
| Base station | Mobile station | |
| 25 to 30 MHz: | ||
| 3 W or less | .002 | .005 |
| Over 3 W | .002 | .002 |
| 30 to 300 MHz: | ||
| 3 W or less | .0005 | .005 |
| Over 3 W | .0005 | .0005 |
| 300 to 500 MHz, all powers | .00025 | .0005 |