47 CFR § 17.57
Report of radio transmitting antenna construction, alteration, and/or removal
February 16, 2021
The owner of an antenna structure for which an Antenna Structure Registration Number has been obtained must notify the Commission within 5 days of completion of construction (FCC Form 854-R) and/or dismantlement (FCC Form 854). The owner must also notify the Commission within 5 days of any change in structure height or change in ownership information (FCC Form 854).
[79 FR 56987, Sept. 24, 2014]