The specifications of §231.27 shall apply except as to the following:
49 C.F.R. §231.28
Secs. 2, 4, and 6, 27 Stat. 531, as amended; secs, 1 and 3, 32 Stat. 943, as amended; sec. 6(e) and (f), 80 Stat. 939 ( 45 U.S.C. 2, 4, 6, 8, and 10, 11 - 16 and 49 U.S.C. 103(c)(1)