In the United States, these laws are enforced locally in addition to state law and federal law. In some states, the state legislature has limited the scope of local ordinances. This approach was made popular by John Forrest Dillon called the "Dillon Rule". The law in such states says that local governments could only adopt ordinances when the state gives them authority on particular subjects. States that do not follow the Dillon Rule believe that local government has inherent (unstated) powers of self-government. In those states, local government can make ordinances on any subject not prohibited by the state legislature.