US lawFederal (United States)RegulationsTitle 47 CFR — TelecommunicationChapter I — FEDERAL COMMUNICATIONS COMMISSIONPart 17 — CONSTRUCTION, MARKING, AND LIGHTING OF ANTENNA STRUCTURESSubpart C — Specifications for Obstruction Marking and Lighting of Antenna Structures17.5647 C.F.R. § 17.56Maintenance of lighting equipment.Last amended: 2016Year: 2026Length: 26 wordsOfficial source Cite as 47 C.F.R. § 17.56 (2026)Replacing or repairing of lights, automatic indicators or automatic control or alarm systems shall be accomplished as soon as practicable. [79 FR 56986, Sept. 24, 2014]Previous47 C.F.R. § 17.54Next47 C.F.R. § 17.57