33 C.F.R. § 168.10 : Navigation and Navigable Waters — COAST GUARD, DEPARTMENT OF HOMELAND SECURITY — PORTS AND WATERWAYS SAFETY — ESCORT REQUIREMENTS FOR CERTAIN TANKERS — Responsibilities

(a) The tanker owner or operator shall:
(1) select escort vessels that can meet the performance requirements of this part; and
(2) inform the tanker master of the performance capabilities of the selected escort vessels. This information must be provided to the master before beginning the escort transit.
(b) The tanker master shall operate the tanker within the performance capabilities of the escort vessels, taking into account speed, sea and weather conditions, navigational considerations, and other factors that may change or arise during the escort transit.
(c) In an emergency, the tanker master may deviate from the requirements of this part to the extent necessary to avoid endangering persons, property, or the environment, but shall immediately report the deviation to the cognizant Coast Guard Captain of the Port (COTP).

33 C.F.R. § 168.10