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water, and interests in land or water to be deleted from the System unit does not exceed $750,000.

(D) The proposed boundary change is not an element of a more comprehensive boundary change proposal.

(E) The proposed boundary has been subject to a public review and comment period.

(F) The Director obtains written consent for the boundary change from all property owners whose land, water, or interests in land or water, or a portion of whose land, water, or interests in land or water, will be added to or deleted from the System unit by the boundary change.

(G) The land abuts other Federal land administered by the Director.

(6) Act of congress required.—Minor boundary changes involving only deletions of acreage owned by the Federal Government and administered by the Service may be made only by Act of Congress.

§ 100507. Additional areas for System

(a) Monitoring Areas for Inclusion in System.—The Secretary shall investigate, study, and continually monitor the welfare of areas whose resources exhibit qualities of national significance and that may have potential for inclusion in the System.

(b) Submission of List of Areas Recommended for Study for Potential Inclusion.—

(1) When list is to be submitted.—At the beginning of each calendar year, with the annual budget submission, the Secretary shall submit to the Committee on Natural Resources of the House of Representatives and the Committee on Energy and Natural Resources of the Senate a list of areas recommended for study for potential inclusion in the System.

(2) Factors to be considered.—In developing the list to be submitted under this subsection, the Secretary shall consider—

(A) the areas that have the greatest potential to meet the established criteria of national significance, suitability, and feasibility;

(B) themes, sites, and resources not already adequately represented in the System; and

(C) public petitions and Congressional resolutions.

(3) Accompanying synopsis.—Accompanying the annual listing of areas shall be a synopsis, for each report previously submitted, of the current and changed condition of the resource integrity of the area and other relevant factors, compiled as a result of continual periodic monitoring and embracing the period since the previous submission or initial report submission one year earlier.

(4) Congressional authorization required.—No study of the potential of an area for inclusion in the System may be initiated except as provided by specific authorization of an Act of Congress.

(5) Authority to conduct certain activities not limited.—This section and sections 100901(b), 101702(b) and (c), and 102102 of this title do not limit the authority of the Service to conduct preliminary resource assessments, gather data on potential study areas, provide technical and planning assistance, prepare or process nominations for administrative