The Trump administration announced on Friday new guidance for green card hopefuls in the United States that mandates they must return to their home country before seeking permanent lawful status.

The Department of Homeland Security claimed the current policy, which allows immigrants in the country on temporary visas to apply for permanent legal status from within the U.S., is a “loophole” that opens the system up for abuse. Under the policy change, those in the U.S. temporarily and who decide to apply for green cards must now first leave the country, “except in extraordinary circumstances,” according to DHS.