(a) This article shall not apply to a highway, road, street, bridge, or utility structure or facility, nor to any highway, road, street, bridge, or utility structure or facility to be constructed or improved, including any property, building, or other structure or facility to be changed, moved, demolished, acquired, or utilized in connection therewith, or within an historic district or an area designated as historic properties under this article, nor to actions taken in connection therewith by public authorities or utilities charged with the responsibility of constructing, maintaining, repairing, or improving any such highway, road, street, bridge, or utility structure or facility, including any property, building, or other structure or facility to be changed, moved, demolished, acquired, or utilized in connection therewith; provided further, however, that where property lying within an area designated as historic properties or as an historic district, pursuant to this article is sought to be utilized or acquired by any public authority for the purpose of construction or improvement of a highway, road, bridge, utility structure, or facility or street, and the provisions and requirements of Section 106, et seq., of the National Historic Preservation Act of 1966 (16 U.S.C.A. § 470), are applicable to the property acquisition or utilization, the public authority or utility may utilize or acquire any such property, building, or other structure or parts thereof, and change, move, or demolish any building or other structure in accordance with the applicable provisions, requirements, and procedure provided for under such act, including the requirements and procedure as applicable of the Advisory Council on Historic Preservation, Section 36, Code of Federal Regulations 800 (16 U.S.C.A. § 470i), and in accordance with the provisions, requirements, and procedure as applicable under Section 4(f) of the U.S. Department of Transportation Act of 1966, as amended, 49 U.S.C.A. § 1653(f), and under 23 U.S.CA § 138.

(b) In the event the foregoing National Historic Preservation Act or Section 4(f) are not applicable to the property, building, or other structure, they shall be exempt from the provisions of this article.