All class I railroads, as described in § 1240.1 of this chapter, subject to Part I of the Interstate Commerce Act, shall compile and report freight commodity statistics on the basis of the commodity codes named in § 1248.101 . Carriers shall report quarterly on the basis of the 3, 4 and 5-digit commodity codes named in that section. Such reports shall be made in conformity with the outline of terms set forth in §§ 1248.2 to 1248.5 , inclusive, as supplemented by instructions included in the appropriate report form to be supplied to the reporting railroads.
49 C.F.R. § 1248.1