Updates federal rules for grants that build and improve space launch infrastructure. It defines who counts as a “public agency,” limits federal grant funding to no more than 90% of a project cost (with a national-interest waiver possible), tightens eligibility rules, requires interagency consultation during grant decisions, and directs the Secretary of Transportation to send a report to Congress on implementation by specified deadlines. The change also makes technical edits and appropriation-related adjustments to chapter 511 of title 51 of the U.S. Code.