Commencing with the year ending December 31, 1982, and thereafter, until further order, all railroad companies not required to file an Annual Report (Form R-1) shall compute their adjusted revenues using the railroad revenue deflator formula. If there is a change in a carrier's classification the survey form shall be filed with the Office of Economics, Surface Transportation Board, Washington, DC, on or before March 31.
49 C.F.R. § 1241.15