; and (B) by inserting after subparagraph (F) the following new subparagraph (G): (G) An assessment of the sufficiency of developmental test and evaluation plans. . (2) Addition to Milestone C brief summary report Section 2366c(a) of such title is amended by inserting after paragraph (3) the following new paragraph: (4) An assessment of the sufficiency of the developmental test and evaluation completed. . (3) Responsibility for conducting assessments For purposes of the sufficiency assessments required by section 2366b(c)(1) and section 2366c(a)(4) of such title, as added by paragraphs (1) and (2), with respect to a major defense acquisition program— (A) if the milestone decision authority for the program is the service acquisition executive of the military department that is managing the program, the sufficiency assessment shall be conducted by the service test agency that serves as the lead developmental test and evaluation organization for the program; and (B) if the milestone decision authority for the program is the Under Secretary of Defense for Acquisition and Sustainment, the sufficiency assessment shall be conducted by the senior Department of Defense official with responsibility for developmental testing. (4) Guidance required Within one year after the date of the enactment of this Act, the senior Department of Defense official with responsibility for developmental testing shall develop guidance for the sufficiency assessments required by section 2366b(c)(1) and section 2366c(a)(4) of title 10, United States Code, as added by paragraphs (1) and (2). At a minimum, the guidance shall require— (A) for the sufficiency assessment required by section 2366b(c)(1) of such title, that the assessment address the sufficiency of— (i) the developmental test and evaluation plan; (ii) the developmental test and evaluation schedule, including a comparison to historic analogous systems; (iii) the developmental test and evaluation resources (facilities, personnel, and test assets)