Is the motor carrier responsible if an agent violates a tariff provision?
Yes. Motor carriers who use agents or subcontractors, such as other carriers, to perform services can be held civilly and criminally liable for the actions of those agents. For example, if an agent or a subcontractor hired by a motor carrier to perform a pickup or delivery charges for a service at a rate/price different than the rate specified in the principal motor carrier's tariff, then the motor carrier can be held responsible for the violation both criminally and civilly. (49 USC section 14903(c)).