Immigrant rights groups raise alarms over plan to make all immigrants who do not have legal status, including children, provide personal information and fingerprints.

The move, which could expose unregistered migrants to criminal prosecution, represents a drastic escalation of the administration’s efforts to push millions of immigrants to leave on their own.

In one of his 10 inauguration day executive orders related to immigration, President Donald Trump initially outlined plans for creating a registry and required that Homeland Security “immediately announce and publicize information about the legal obligation of all previously unregistered aliens in the United States to comply.”

Everyone 14 or older and in the U.S. without legal status will be required to give the federal government fingerprints and provide an address. It’s another escalation of the administration’s

But lawyers and immigrant advocates warned that the administration’s plan was on shaky legal ground and that some immigrants may be afraid to comply.

Immigrants in the U.S. illegally who fail to register with the federal government could face significant fines, potential imprisonment or both, according to a directive issued by the Department of Homeland Security on Tuesday.

The move applies to immigrants over the age of 13 who are in the U.S. unlawfully and who have not submitted fingerprints or registered with the federal government.