Historic properties means those buildings or facilities that are listed or eligible for listing in the National Register of Historic Places, or such properties designated as historic under a statute of the appropriate State or local governmental body.
Substantial impairment means a permanent alteration that results in a significant loss of the integrity of finished materials, design quality or special character.
Because the primary benefit of an Historic Preservation Program is the experience of the historic property itself, in taking steps to achieve accessibility, recipients shall give priority to those means which make the historic property, or portions thereof, physically accessible to handicapped individuals.
The Secretary shall periodically review any waiver granted under this section and may withdraw it if technological advances or other changes so warrant.
43 C.F.R. §17.260