FCC Rules are all contained in the U.S. Code of Federal Regulations Title 47. The following Parts contain the relevant rules for operation of broadcast radio stations:

47 CFR Part 17: Construction, Marking, and Lighting of Antenna Structures

47 CFR Part 73: Radio Broadcast Services (Rules for AM, FM and TV Stations)

47 CFR Part 74: Experimental Radio, Auxiliary, Special Broadcast and Other Program Distributional Services (Rules for Translators, Boosters, etc.)