President Donald Trump’s administration is reportedly planning to create a registry for illegal aliens in the U.S. to submit their personal information to or else face criminal charges.

Documents obtained by The Wall Street Journal from the administration show that anyone 14 years of age and older will be required to submit their fingerprints and home addresses to the registry or face criminal prosecution.

Those who do not comply could face up to six months in prison and a $5,000 fine.

Homeland Security Secretary Kristi Noem wrote in a memo describing the new policy that those in the U.S. illegally face a choice.

“They can return home and follow the legal process to come to the United States or they can deal with the consequences of continuing to violate our laws,” she wrote.

The plan relies on the use of a 1940 immigration law that was designed to catch suspected communists. Officials have considered using the law in the past but have decided against it because pursuing the cases would take substantial resources and they don’t believe the payoff is high enough.

The plan aims to target those in the U.S. illegally who have not interacted with the government within the last 30 days, including applying for a work permit or for asylum, the report said.

The plan is to give illegal aliens a month to sign up for the registry after it is created.

The report noted that a similar program was used by then-President George W. Bush after the September 11, 2001, terrorist attacks to register “men and boys from predominantly Muslim countries.” The report said thousands were arrested and deported under that program.

Trump has significantly increased his already tough stance on illegal immigration since coming back into office.

Late last week he signed an executive order gutting all federal funding for any program that goes toward aiding illegal aliens in the U.S.

The president has declared a national emergency at the southern border and deployed significant assets, including the military, to stop the flow of illegal immigration into the U.S.

The results have been an approximately 95% reduction in encountering illegal aliens along the southern border.

Trump has also declared Mexican cartels and notoriously violent illegal alien street gangs as terrorist organizations, which allows the U.S. to use more resources to combat them.