This already exists. The requirement was enshrined in administrative law when the USAF failed to report the nut case that shot up the Texas church before being put down.
Enforcement, however, is an ENTIRELY different story.
Federal Government agencies, yes, the various states, nope, the administrative law still does not direct states to be 100% in compliance. Nor can the Fed direct the states to do so (Printz v US, 1997)