This final action sets forth regulatory changes to improve the administration of the High Seas Fishing Compliance Act program and the monitoring of U.S. fishing vessels operating on the high seas. This final rule includes, for all U.S. fishing vessels operating on the high seas, adjustments to permitting and reporting procedures. It also includes requirements for the installation and operation of enhanced mobile transceiver units (EMTUs) for vessel monitoring, carrying observers on vessels, reporting of transshipments taking place on the high seas, and protection of vulnerable marine ecosystems. This final rule has been prepared to minimize duplication and to be consistent with other established requirements.