(1) Approved umbrella plans provide an efficient and cost-effective mechanism for enrolling vessel owner and operators in contingency plan coverage. Umbrella plans provide response resources to meet the requirements of this chapter. The umbrella plan may be approved for more than one worst case discharge, by port, in areas of operation covered by the plan. Any owner or operator of a covered vessel having a worst case discharge volume that exceeds resources under contract to the umbrella plan may still enroll only if, the vessel owner or operator maintains a contract with another primary response contractor that will provide supplemental response resources, and if those combined resources are sufficient to meet the requirements of this chapter. The vessel owner or operator must provide documentation that authorizes the umbrella plan holder to activate the supplemental response resources, sufficient to meet the worst case discharge of the covered vessel, during a drill, spill or substantial threat of a spill. Documentation must demonstrate the agreement and includes, but is not limited to, authorized representative and commitment letters from contractors, qualified individuals, insurance representatives, member signed enrollment agreements or other letters of intent.

(2) The plan must describe the process for activation of the supplemental resources and shall include the documentation described in subsection (1) of this section. The process for accessing supplemental equipment will be tested in drills.