The U.S. Environmental Protection Agency (EPA) is promulgating a regulation under the Vessel Incidental Discharge Act that establishes Federal standards of performance for marine pollution control devices for discharges incidental to the normal operation of primarily non- Armed Forces and non-recreational vessels 79 feet in length and above into the waters of the United States or the waters of the contiguous zone. The Federal standards of performance were developed in coordination with the U.S. Coast Guard (USCG) and in consultation with interested Governors. The final standards, once made final, effective, and enforceable through corresponding USCG regulations addressing implementation, compliance, and enforcement, will control the discharge of pollutants from vessels described above and repeal certain existing Federal, State, and local vessel discharge requirements, thus streamlining regulation of such vessel incidental discharges. EPA is also promulgating procedures states must follow if they choose to petition EPA to require the use of an emergency best management practice to address aquatic nuisance species (ANS) or water quality concerns ("emergency order"), to review any standard of performance, regulation, or policy, to request additional requirements with respect to discharges in the Great Lakes, or to apply to EPA to prohibit one or more types of vessel discharges regulated by this rule into specified waters to provide greater environmental protection.