Ex Post Facto law "Congress shall pass no Ex Post Facto law", I believe is how it appears in the constitution. It is latin for after the fact.
Ex post facto law
SORNA passed. so the answer is yes.
YES
It is called an ex post facto law.
Ex post facto :)
(in the US) No. The question is an untrue statement.
The legal term for a law that has criminal penalties that effect people prior to the enactment of that law is called an "ex-post facto law". Ex-post facto laws are illegal in most countries and the US Constitution expressly forbids the creation or passage of an ex-post facto law.
Ex Post Facto Laws (after the fact)
That would be making a law retroactive to a date before the passing of the law. The US Constitution forbids doing it. That would be known as an Ex Post Facto Law and is unconstitutional.
SORNA passed. so the answer is yes.
Yes, an ex post facto law cannot impose punishment on a person who committed an act before it was illegal. This includes increasing the severity of the punishment from what it was when the crime was committed. Ex post facto applies to criminal law and not civil law as interpreted by the U.S. Supreme Court. Also, some laws, for example the sex offenders registry, are considered a regulatory device for public safety and not a punitive action. no ex-post facto law after the fact. no ex-post facto law after the fact.