54 U.S.C. § 300305
Historic conservation district
In this division, the term “historic conservation district” means an area that contains—
(1)
historic property;
(2)
buildings having similar or related architectural characteristics;
(3)
cultural cohesiveness; or
(4)
any combination of features described in paragraphs (1) to (3).
( Pub. L. 113–287, § 3 , Dec. 19, 2014 , 128 Stat. 3188 .)