47 CFR § 73.297 - FM stereophonic sound broadcasting. | Electronic Code of Federal Regulations (e-CFR) | US Law | LII / Legal Information Institute
(a) An FM broadcast station may, without specific authority from the FCC, transmit stereophonic (biphonic, quadraphonic, etc.) sound programs upon installation of stereophonic sound transmitting equipment under the provisions of §§ 2.1001, 73.322, and 73.1590 of the Rules. Prior to commencement of stereophonic sound broadcasting, equipment performance measurements must be made to ensure that the transmitted signal complies with all applicable rules and standards.| LII / Legal Information Institute
