; and (2) by adding at the end the following new subsection: (h) Explosives used by space launch vehicles (1) The Secretary of Defense shall delegate to the Secretary of the Air Force, who may further delegate to the Commanders of the Space Launch Deltas, the responsibilities under subsection (c) with respect to explosives used by space launch vehicles. (2) In this subsection, the term launch vehicle has the meaning given such term in section 50902(11) of title 51. . (b) Improved process for yield determination Not later than one year after the date of the enactment of this Act, the Secretary of Defense, the Secretary of Transportation, and the Administrator of the National Aeronautics and Space Administration shall jointly establish a process through which scientifically-valid yield determinations can be assessed for space launch vehicles while in flight. (c) Report Not later than 90 days after the completion of the LOX-Methane Assessment working group process, the Secretary of Defense, the Secretary of Transportation, and the Administrator of the National Aeronautics and Space Administration shall submit to the appropriate congressional committees a report that includes a description of the effects of the LOX-Methane Assessment on existing and future maximum credible event analyses and any resulting effects on commercial space launch, civil space activities, and national security. (d) Definitions In this section: (1) The term appropriate congressional committees means the following: (A) The congressional defense committees. (B) The Committee on Commerce, Science, and Transportation of the Senate. (C) The Committee on Science, Space, and Technology of the House of Representatives. (D) The Committee on Transportation and Infrastructure of the House of Representatives. (2) The term LOX-Methane Assessment working group means the ongoing interagency working group studying the explosive characteristics of liquid oxygen and methane and comprised of representatives from the Department of Defense, the Department of