The U.S. Constitution forbids any law that conflicts with existing Federal Laws. It also forbids any law that violates the Constitution itself.
States cannot pass laws the contradict the Constitution
The Constitution says that laws passed by Congress are supplemental to State Laws. Both State and Federal Laws are to be upheld by all United States citizens.
The U.S. Constitution is the highest authority in the country.
Constitutional
The United States Constitution allocates the power to make laws to the Legislative branch.
In the US - there is no such thing. They are known as "Ex Post Facto" laws and are forbidden by the Constitution.
Constitution
overriding the federal laws
A written document stating rights and laws
the constitution
The British constitution is 'unwritten'. It is a collection of laws, conventions and case law. There is no codified constitution as there is for example, in the USA.
They must follow the rules of the constitution .
(in the US) Ex Post Facto laws are forbidden by the US Constitution.
AnswerThe court systems of the United States do not make laws, they interprete laws. To make a law retroactive (ex post facto) is specifically forbidden in the US Constitution.
"Ex post facto", or "after the fact" laws, and Bills of Attainder, which specifically seize the property of named persons.
The answer is the constitution. The constitution is the body of laws that every body agrees the obey
Substantive laws define if acts are crimes. They also define punishments.