{"data":{"id":"us/47-cfr-90.361","jurisdiction":"us","citation":"47 CFR 90.361","heading":"Interference from part 15 and Amateur operations.","body":"Operations authorized under parts 15 and 97 of this chapter may not cause harmful interference to LMS systems in the 902-928 MHz band. These operations will not be considered to be causing harmful interference to a multilateration LMS system operating in one of the three EA sub-bands (see § 90.357(a)) if they are non-video links operating in accordance with the provisions of parts 15 or 97 of this chapter and at least one of the following conditions are met:\n(a) It is a field disturbance sensor operating under § 15.245 of this chapter and it is not operating in the 904-909.750 or 919.750-928.000 MHz sub-bands; or\n(b) It does not employ an outdoor antenna; or\n(c) If it does employ an outdoor antenna, then if:\n(1) The directional gain of the antenna does not exceed 6 dBi, or if the directional gain of the antenna exceeds 6 dBi, it reduces its transmitter output power below 1 watt by the proportional amount that the directional gain of the antenna exceeds 6 dBi; and\n(2) Either:\n(i) The antenna is 5 meters or less in height above ground; or\n(ii) The antenna is more than 5 meters in height above ground but less than or equal to 15 meters in height above ground and either:\n(A) Adjusts its transmitter output power below 1 watt by 20 log (h/5) dB, where h is the height above ground of the antenna in meters; or\n(B) Is providing the final link for communications of entities eligible under subpart B or C of this part, or is providing the final link for communications of health care providers that serve rural areas, elementary schools, secondary schools or libraries.","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES","PART 90—PRIVATE LAND MOBILE RADIO SERVICES","Subpart M—Intelligent Transportation Systems Radio Service"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-47.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:28Z","sha256":"d3dea5360d95b7115ff39a22e2628341752d21c25d0b0b8f68948b9f5563d827","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-90.359","next":"us/47-cfr-90.363-90.365"},"notice":"GroundRules: Original legal text. Not legal advice."}