agent who acts under authority of power of attorney is fully authorized to act
for the principals that have named him their agent and attorney, and therefore,
when an agent publishes rates in his tariffs which are to displace the rates in
his principals' tariff, the agent must cancel the rates in his principals'
tariffs as per ARM 38.3.2713.
carrier must not publish in its individual tariff rates which are to displace
the rates published in a tariff of a duly authorized agent unless the tariff is
accompanied by a supplement issued by the agent cancelling the rates in his
tariff effective on the same date, as per ARM 38.3.2713.