47 CFR § 95.991 - CBRS marketing limitations.
(a) External radio frequency power amplifiers. No person shall manufacture, import, sell or offer for sale any external radio frequency power amplifier capable of operation below 144 MHz and intended for use in the CBRS. See § 2.815 of this chapter.
(b) External frequency determining devices. No person shall manufacture, import, sell or offer for sale, any add-on device, whether internal or external, the function of which is to extend the transmitting frequency capability of a CBRS transmitter beyond that allowed by §§ 95.963 and 95.965.
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