Still reading this very word dense executive order that came out recently: https://www.whitehouse.gov/briefing-room/presidential-actions/2025/01/16/exe... I did notice however that it has:
(i) Within 90 days of the date of this order, FCEB agencies shall take steps to ensure that all of their assigned Internet number resources (Internet Protocol (IP) address blocks and Autonomous System Numbers) are covered by a Registration Services Agreement with the American Registry for Internet Numbers or another appropriate regional Internet registry.
I don't have numbers on hand for how much US Gov space is already with ARIN, but this seems like a pretty nice win for ARIN getting an order for the US Gov legacy space attached to them (mentioned by name), while other RIRs are available in that order, I don't imagine it's going to other RIRs :)