Since 1966, Section 4(f) has undergone two minor changes, although neither has affected the statute's intent. The first of these changes was a 1968 amendment to Section 4(f)'s wordingan effort by lawmakers to reconcile the language with a similar piece of legislation. The second change was a result of the 1983 recodification of the DOT Act, in which Section 4(f) became 49 U.S.C. Section 303. Technically speaking, the statute is no longer Section 4(f); however, because of its widespread familiarity among state and federal employees, it continues to be officially recognized by its original name.
