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republic-os/legal/us/code/title-41/chapter-1/section-109.md
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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-06 10:51:44 -04:00

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---
type: "LegalText"
title: "41 U.S.C. § 109"
description: "Major system"
jurisdiction: "us"
corpus: "united_states_code"
kind: "code_section"
title_number: 41
title_name: "PUBLIC CONTRACTS"
chapter_number: "1"
chapter_name: "DEFINITIONS"
section: "109"
citation: "41 U.S.C. § 109"
status: "current"
release_point: "119-100"
release_date: "2026-06-26"
source: "official"
source_url: "https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc41@119-100.zip"
source_identifier: "/us/usc/t41/s109"
source_file: "data/legal/raw/us/code/title-41/usc41.xml"
source_hash: "554fb8e87f7be31ffe6e3ad033d078f66b24c05573589e0ce00d98cc41cbf239"
raw_snapshot_hash: "0977ff7e7fefd99bbd25a86e009a9e4c2707301ec8c49233d17b6604e38702e3"
text_hash: "dda70611f0804422a7d15b79daf8b3f23615abf9a25405d4efa66726d41cb0da"
retrieved_at: "2026-07-04"
confidence: "official"
tags: ["legal", "us-code"]
---
# 41 U.S.C. § 109 - Major system
## Text
(a) In General.— In this subtitle, the term “major system” means a combination of elements that will function together to produce the capabilities required to fulfill a mission need. These elements may include hardware, equipment, software, or a combination of hardware, equipment, and software, but do not include construction or other improvements to real property.
(b) System Deemed To Be Major System.— A system is deemed to be a major system if—
(1) the Department of Defense is responsible for the system and the total expenditures for research, development, testing, and evaluation for the system are estimated to exceed $75,000,000 (based on fiscal year 1980 constant dollars) or the eventual total expenditure for procurement exceeds $300,000,000 (based on fiscal year 1980 constant dollars);
(2) a civilian agency is responsible for the system and total expenditures for the system are estimated to exceed the greater of $750,000 (based on fiscal year 1980 constant dollars) or the dollar threshold for a major system established by the agency pursuant to Office of Management and Budget (OMB) Circular A109, entitled “Major Systems Acquisitions”; or
(3) the head of the agency responsible for the system designates the system a major system.
(Pub. L. 111350, § 3, Jan. 4, 2011, 124 Stat. 3680.)
## Notes
Historical and Revision Notes RevisedSectionSource (U.S. Code)Source (Statutes at Large) 10941:259(c)(7).June 30, 1949, ch. 288, title III, § 309(c)(7), as added Pub. L. 98369, title VII, § 2711(a)(3), July 18, 1984, 98 Stat. 1180; Pub. L. 98577, title V, § 504(a)(4), Oct. 30, 1984, 98 Stat. 3086; Pub. L. 103355, title I, § 1551, Oct. 13, 1994, 108 Stat. 3299.  41:403(9).Pub. L. 93400, § 4(9), formerly § 4(10), as added Pub. L. 98577, title I, § 102(3), Oct. 30, 1984, 98 Stat. 3067; redesignated as § 4(9), Pub. L. 100679, § 3(c), Nov. 17, 1988, 102 Stat. 4056; Pub. L. 103355, title VIII, § 8001(b)(1)(3), Oct. 13, 1994, 108 Stat. 3386.