(This measure has not been amended since it was introduced. The summary has been expanded because action occurred on the measure.)
Thunder Bay National Marine Sanctuary and Underwater Preserve Boundary Modification Act - Expands, notwithstanding any provision of law or regulation, the boundaries of the Thunder Bay National Marine Sanctuary and Underwater Preserve in Lake Huron, located off the northeast coast of Michigan's Lower Peninsula. Requires that the expanded area be managed as part of the National Marine Sanctuary System.
Authorizes the Secretary of Commerce to certify that any license, permit, approval, other authorization, or right to conduct a prohibited activity (made pursuant to specified regulations) that exists on enactment of this Act shall apply to such an activity conducted within the area added by this Act.