47 CFR § 73.751
Operating power
February 16, 2021
No international broadcast station shall be authorized to install, or be licensed for operation of, transmitter equipment with:
(a) A rated carrier power of less than 50 kilowatts (kW) if double-sideband (DSB) modulation is used,
(b) A peak envelope power of less than 50 kW if single-sideband (SSB) modulation is used, or
(c) A mean power of less than 10 kW if digital modulation is used.
[70 FR 46676, Aug. 10, 2005]