APPLICABILITY TO NATIONAL SECURITY SYSTEMS.

SEC. 5141. APPLICABILITY TO NATIONAL SECURITY SYSTEMS. (a) In General.— Except as provided in subsection (b), this title does not apply to national security systems. (b) Exceptions.— (1) In general.— Sections 5123, 5125, and 5126 apply to national security systems. (2) Capital planning and investment control.— The heads of executive agencies shall apply sections 5112 and 5122 to national security systems to the extent practicable. (3) Performance and results of information technology investments.— (A) Subject to subparagraph (B), the heads of executive agencies shall apply section 5113 to national security systems to the extent practicable. (B) National security systems shall be subject to section 5113(b)(5) except for subparagraph (B)(iv) of that section.