47 C.F.R. §90.173
Secs. 4, 303, 307, 48 Stat., as amended, 1066, 1082, 1083; 47 U.S.C. 154 , 303 , 307
For Federal Register citations affecting § 90.173 , see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.fdsys.gov.