Under 14 CFR § 107.53, may a remote pilot operate a small unmanned aircraft system with ADS-B Out equipment in transmit mode?

Why: 14 CFR § 107.53 states that unless otherwise authorized by the Administrator, no person may operate a small unmanned aircraft system under part 107 with ADS-B Out equipment in transmit mode.

• This invents an altitude-based ADS-B requirement resembling the manned-aviation rule in 14 CFR § 91.225; part 107 instead bars ADS-B Out transmission absent authorization, with no altitude exception.
• The 30-nautical-mile Class B 'Mode C veil' concept is a manned-aviation ADS-B/transponder rule; it does not create an exception to § 107.53's prohibition for small UAS.