(a) Definition.—
(1) National security system.—In this section, the term “national security system” means a telecommunications or information system operated by the Federal Government, the function, operation, or use of which—
(b) In General.—
Except as provided in subsection (c), chapter 113 of this title does not apply to national security systems.
(c) Exceptions.—
(2) Capital planning and investment control.—
The heads of executive agencies shall apply sections 11302 and 11312 of this title to national security systems to the extent practicable.
(3) Applicability of performance-based and results-based management to national security systems.—
(A) In general.—
Subject to subparagraph (B), the heads of executive agencies shall apply section 11303 of this title to national security systems to the extent practicable.
(B) Exception.—
National security systems are subject to section 11303(b)(5) of this title, except for subparagraph (B)(iv).