47 CFR § 73.1735
AM station operation pre-sunrise and post-sunset
February 16, 2021
Certain classes of AM stations are eligible to operate pre-sunrise and/or post-sunset for specified periods with facilities other than those specified on their basic instruments of authorization. Such pre-sunrise and post-sunset operation is authorized pursuant to the provisions of §73.99 of the Rules.
[49 FR 41249, Oct. 22, 1984]