10 U.S.C. § 223
Section 223 · Ballistic missile defense programs: program elements
Current version, with additions and removals from the October 17, 1998 version.
(1) The Patriot system.
(2) The Navy Area system.
(3) The Theater High-Altitude Area Defense system.
(4) The Navy Theater Wide system.
(5) The Medium Extended Air Defense System.
(6) Joint Theater Missile Defense.
(7) National Missile Defense.
(8) Support Technologies.
(9) Family of Systems Engineering and Integration.
(10) Ballistic Missile Defense Technical Operations.
(11) Threat and Countermeasures.
(12) International Cooperative Programs.
(b) Treatment of Major Defense Acquisition Programs.—Amounts requested for Theater Missile Defense and National Missile Defense major defense acquisition programs shall be specified in individual, dedicated program elements, and amounts appropriated for those programs shall be available only for Ballistic Missile Defense activities.
(b) Separate Program Elements for Programs Entering Engineering and Manufacturing Development.—(1) The Secretary of Defense shall ensure that each ballistic missile defense program that enters engineering and manufacturing development is assigned a separate, dedicated program element.
(2) In this subsection, the term “engineering and manufacturing development” means the period in the course of an acquisition program during which the primary objectives are to—
(A) translate the most promising design approach into a stable, interoperable, producible, supportable, and cost-effective design;
(B) validate the manufacturing or production process; and
(C) demonstrate system capabilities through testing.