E1F03

Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?

1. AGain is less than 23 dB when driven by power of 10 watts or less
2. BThe equipment dealer assembled it from a kit
3. CIt was manufactured and certificated in a country which has a reciprocal certification agreement with the FCC
4. DThe amplifier is constructed or modified by an amateur radio operator for use at an amateur station

Pick an answer to check it.