The administration issued a final interim rule that will bar certain migrants caught crossing the border between ports of entry. The regulation will be paired with a presidential proclamation that outlines the migrants subject to the asylum bar, administration officials said on a call with reporters. The officials would not detail who could be subject to the ban.

The regulation seeks to “channel inadmissible aliens to ports of entry, where they would be processed in a controlled, orderly, and lawful manner,” according to a notice posted online Thursday afternoon.