The Alien Registration Requirement regulation (including Address Change requirements) went into effect on April 11, 2025 (with a 30-day deadline to comply) and carries stiff penalties for non-compliance, including the possibility of criminal prosecution and removal from the United States. The rule is currently being litigated, and if successful may be enjoined by a court.
Unless and until that time, all non-citizens must:
Carry proof of registration at all times. For most nonimmigrant visa holders, this will be a printout of the Form I-94 retrievable at https://i94.cbp.dhs.gov/search/recent-search
File address changes with USCIS within 10 days of a move. https://www.uscis.gov/addresschange
Ensure that minor children turning 14 years of age register and carry proof of registration.
DISCLAIMER: This information is not intended as legal advice in any specific case. The facts of a specific case may render the information inapplicable.