George Sutherland, Chicago Railway Company v. United States…
“ The very language of the Esch Car Service Act, authorizing the Commission to establish 'rules, regulations, and practices with respect to car service * * * including the compensation to be paid,' treats car-hire as one form of regulation of the service. It is but a recognition of the historic fact that the car-hire charge may serve to penalize the unnecessary detention of cars and thus to regulate car movement, one of the considerations which led to the substitution of the per diem charge for the mileage system of car-hire payments. ”
