40-374. Prohibition of rebates and
agreements


Except as otherwise provided in this chapter, no public service corporation shall
charge, demand, collect or receive a greater, less, or different compensation for
transportation of persons or property, or for any product or commodity, or for any
service rendered in connection therewith, than the rates, fares, tolls, rentals and
charges applicable to such transportation or product, commodity or service specified in
its schedule on file and in effect at the time, nor shall any public service corporation
refund or remit, directly or indirectly, in any manner or by any device, any part of the
rates, fares, tolls, rentals and charges so specified, nor extend to any person any form
of contract, agreement, or any rule or regulation, or any facility or privilege, except
such as are regularly and uniformly extended to all persons and except upon order of the
commission.