Although the advertising control provisions of the Highway Beautification Act of 1965 have been the subject of unremitting controversy from the date of enactment until the present time, only three substantive amendments to title I have been adopted in the intervening years. These are the amendments to subsections ( d) and (j) and the addition of a new subsection (n) all of which were adopted in 1968.
Roger A. Cunningham,
Billboard Control under the Highway Beautification Act of 1965,
Mich. L. Rev.
Available at: https://repository.law.umich.edu/mlr/vol71/iss7/2