This proposed rule would make conforming amendments to regulations implementing the various statutes amended by the Illegal, Unreported and Unregulated Fishing Enforcement Act of 2015 (Pub. L. 114-81). The Act amends several regional fishery management organization implementing statutes as well as the High Seas Driftnet Fishing Moratorium Protection Act. It also provides authority to implement two new international agreements under the Antigua Convention, which amends the Convention for the establishment of an Inter-American Tropical Tuna Commission, and the United Nations Food and Agriculture Organization Agreement on Port State Measures to Prevent, Deter, and Eliminate Illegal, Unreported and Unregulated Fishing (Port State Measures Agreement), which restricts the entry into U.S. ports by foreign fishing vessels that are known to be or are suspected of engaging in illegal, unreported, and unregulated fishing. This proposed rule would also implement the Port State Measures Agreement. To that end, this proposed rule would require the collection of certain information from foreign fishing vessels requesting permission to use U.S. ports. It also includes procedures to designate and publicize the ports to which foreign fishing vessels may seek entry and procedures for conducting inspections of these foreign vessels accessing U.S. ports. Further, the rule would establish procedures for notification of: the denial of port entry or port services for a foreign vessel, the withdrawal of the denial of port services if applicable, the taking of enforcement action with respect to a foreign vessel, or the results of any inspection of a foreign vessel to the flag nation of the vessel and other competent authorities as appropriate.