National Historic Preservation Act Amendments of 1991

National Historic Preservation Act Amendments of 1991 - Amends the National Historic Preservation Act to: (1) require the Secretary of the Interior to report, at least once every four years, to the President and to the Congress, on a review of threats to properties included in or eligible for the National Register of Historic Places; (2) revise requirements for Federal and State historic preservation programs; (3) provide for tribal and Native Hawaiian historic preservation programs; (4) provide for matching grants to States and direct grants to Indian tribes and Native Hawaiian organizations to carry out this Act; (5) require development of a comprehensive preservation education and training program; (6) revise requirements for awarding and apportioning grants under this Act; (7) require adaptive use alternatives for Federal agency historic properties; and (8) provide for disposition of archaeological materials.

Requires the Advisory Council on Historic Preservation to study and report to the Congress on the feasibility of establishing a registration program for artifacts removed from domestic and foreign archaeological sites. Authorizes appropriations. Requires the Council to call for and organize U.S. leadership and participation in an international conference on the international antiquities trade. Provides that the conference shall be held in 1992 as part of the commemoration of the 500th anniversary of the Columbus Discovery Voyage. Amends the National Historic Preservation Act to include within the membership of the council one member of an Indian tribe or Native Hawaiian organization appointed by the President.

Prohibits public access to certain information about historic resources in specified circumstances.

Establishes in the National Park Service a National Center for Preservation Technology. Establishes a Preservation Technology Board to: (1) provide leadership, policy advice, coordination, and professional oversight to the Center; (2) advise on priorities and the allocation of funds among Center activities; and (3) submit an annual report to the President and the Congress. Authorizes appropriations.

Requires the Secretary to study and report to the Congress on: (1) the status of the inclusion of artifacts, records, and material remains on the National Register of Historic Places; and (2) the advisability of including traditional cultural practices and lifeways on it.