The states may enact legislation concerning a subject in which there is a federal statute if:

A) Congress has not clearly indicated that it intends to control that subject matter.
B) the states petition the Supreme Court for permission.
C) the state legislation falls within the Necessary and Proper Clause.
D) the states reserve the right at the time the federal statute is enacted.

Federal Statute

A law enacted by the national government that applies to all states and people within the United States.

Legislation

The process of making or enacting laws, including the preparation and passage of bills through a legislative body.

Congress

The legislative branch of the United States government, responsible for making laws and consisting of two chambers: the Senate and the House of Representatives.