SECTION 1. SHORT TITLE.

    This Act may be cited as the ``Thunder Bay National Marine 
Sanctuary and Underwater Preserve Boundary Modification Act''.

SEC. 2. FINDINGS AND PURPOSES.

    (a) Findings.--Congress makes the following findings:
            (1) Thunder Bay National Marine Sanctuary and Underwater 
        Preserve in Lake Huron contains more than 100 recorded historic 
        vessel losses.
            (2) The areas immediately surrounding the Sanctuary, 
        including the offshore waters of Presque Isle and Alcona 
        counties, Michigan, contain an equal number of historic vessel 
        losses.
            (3) Many of these shipwrecks and underwater cultural 
        resources are popular recreational diving destinations, and all 
        contribute to our collective maritime heritage.
            (4) These resources are susceptible to damage from human 
        activities, and must be properly preserved for themselves and 
        to protect the economic viability of their contribution to 
        national and regional economies.
    (b) Purposes.--The purposes of this Act are--
            (1) to expand the Thunder Bay National Marine Sanctuary and 
        Underwater Preserve boundaries to encompass the offshore waters 
        of Presque Isle and Alcona counties, Michigan and outward to 
        the international border between the United States and Canada; 
        and
            (2) to provide the underwater cultural resources of those 
        areas equal protection to that currently afforded to the 
        Sanctuary.

SEC. 3. DEFINITIONS.

    In this Act:
            (1) Sanctuary.--The term ``Sanctuary'' means the Thunder 
        Bay National Marine Sanctuary and Underwater Preserve.
            (2) Secretary.--The term ``Secretary'' means the Secretary 
        of Commerce.

SEC. 4. SANCTUARY BOUNDARY ADJUSTMENT.

    (a) Boundary Adjustment.--Notwithstanding any provision of law or 
regulation, including section 922.190 of title 15, Code of Federal 
Regulations, as in effect on the date of the enactment of this Act, the 
Sanctuary shall consist of the geographic area described in subsection 
(b).
    (b) Expanded Sanctuary Boundary.--The area referred to in 
subsection (a) is all submerged lands, including the underwater 
cultural resources, lake ward of the mean high water line, within the 
boundaries of a line formed by connecting points in succession 
beginning at a point along the mean high water line located 
approximately at 45.628741N, 84.206983W (at Hammond Bay in Presque Isle 
County) then due east to the international boundary between the United 
States and Canada approximately located at 45.628741N, 83.163783W then 
following the international boundary between the United States and 
Canada in a generally southeasterly direction where it intersects 
latitude 44.511111N, then due west to a point along the mean high water 
line located approximately at 44.511111N, 83.318483W (in Alcona County 
just south of the town of Greenbush) returning to the first point along 
the mean high water line.
    (c) Authority To Make Minor Adjustments.--The Secretary may make 
minor adjustments to the boundary described in subsection (b) to 
facilitate enforcement and clarify the boundary to public provided the 
resulting boundary is consistent the purposes described in section 
2(b).
    (d) Inclusion in the System.--The area described in subsection (b), 
as modified in accordance with subsection (c), shall be managed as part 
of the National Marine Sanctuary System established by section 301(c) 
of the National Marine Sanctuaries Act (16 U.S.C. 1431(c)), in 
accordance with that Act.
    (e) Updated NOAA Charts.--The Secretary shall--
            (1) produce updated National Oceanic and Atmospheric 
        Administration charts for the area in which the Sanctuary is 
        located; and
            (2) include on such charts the boundaries of the Sanctuary 
        described in subsection (b), as modified in accordance with 
        subsection (c).

SEC. 5. EXTENSION OF REGULATIONS AND MANAGEMENT.

    (a) Regulations.--The regulations applicable to the Sanctuary 
codified in subpart R of part 922 of title 15, Code of Federal 
Regulations, as in effect on the date of the enactment of this Act, 
shall apply to the geographic area added to the Sanctuary pursuant to 
section 4, unless the Secretary specifies otherwise by regulation.
    (b) Existing Certifications.--The Secretary may certify that any 
license, permit, approval, other authorization, or right to conduct a 
prohibited activity made pursuant to section 922.194 of title 15, Code 
of Federal Regulations, that exists on the date of the enactment of 
this Act shall apply to such an activity conducted within the 
geographic area added to the Sanctuary pursuant to section 4.
    (c) Date of Sanctuary Designation.--For purposes of section 922.194 
of title 15, Code of Federal Regulations, the date of the enactment of 
this Act shall be deemed to be the date of Sanctuary designation.
    (d) Management Plan.--To the extent practicable, the Secretary 
shall apply the management plan in effect for the Sanctuary of the date 
of the enactment of this Act to the geographic area added to the 
Sanctuary pursuant to section 4.
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.
To expand the boundaries of the Thunder Bay National Marine Sanctuary and Underwater Preserve and for other purposes.