What is a D-1 crewmember certification?
Performance of longshore work at U.S. ports by D-1 crewmembers on foreign vessels is generally prohibited with few exceptions. One such exception requires an employer to file an attestation stating that it is the prevailing practice for the activity at that port, there is no strike or lockout at the place of employment, and that notice has been given to U.S. workers or their representatives.
