The Obama administration is working to close a loophole in the nation’s gun laws that allows for some machine guns and sawed-off shotguns to be sold without the buyer submitting fingerprints or photographs.

The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) is working on a new regulation that would require more background information when the weapons are sold to someone through a corporation or legal trust.

That would eliminate a discrepancy between sales to individuals and those to legal entities, including so-called “gun trusts,” which firearms enthusiasts have used to acquire the weapons without going through normal channels.

On Tuesday, the ATF sent the proposed regulation to the White House for a 90-day review, a final step before the draft rule is unveiled to the public.