The provisions of this part apply only to Class I and II motor common carriers of general freight subject to accounting instruction number 27 of the Board's Uniform System of Accounts (49 CFR Part 1207).

In any proceeding requiring the development of platform handling times for distribution of platform expense, carriers may use the results of the national weight formula contained in the Board's study, entitled 1977-1978 Motor Carrier Platform Study, Statement 2S1-79.