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republic-os/legal/us/code/title-41/chapter-45/section-4503.md
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Fabio 76b8ec33a7 Legal corpus: the complete U.S. Code (59,740 sections, all 53 titles)
Ingested titles 12–51 and 54 from OLRC USLM XML @119-100 (the whole Code
now, uniform edition; Title 53 is reserved/empty). LegalText 11,221 ->
59,740; repo total 105,704 records. Deterministic (byte-identical rerun,
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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. § 4503"
description: "Security for advance payments"
jurisdiction: "us"
corpus: "united_states_code"
kind: "code_section"
title_number: 41
title_name: "PUBLIC CONTRACTS"
chapter_number: "45"
chapter_name: "CONTRACT FINANCING"
section: "4503"
citation: "41 U.S.C. § 4503"
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/s4503"
source_file: "data/legal/raw/us/code/title-41/usc41.xml"
source_hash: "2b6565a5e0889696e47a3c3ee4802a588124b3b93995cda744ee92c2e2ee7703"
raw_snapshot_hash: "0977ff7e7fefd99bbd25a86e009a9e4c2707301ec8c49233d17b6604e38702e3"
text_hash: "c0cb169a5f0b35e55670494a547ea1072d6573fd3bdf2fe33255bb7cc5063bf3"
retrieved_at: "2026-07-04"
confidence: "official"
tags: ["legal", "us-code"]
---
# 41 U.S.C. § 4503 - Security for advance payments
## Text
Advance payments under section 4501 of this title may be made only on adequate security and a determination by the agency head that to do so would be in the public interest. The security may be in the form of a lien in favor of the Federal Government on the property contracted for, on the balance in an account in which the payments are deposited, and on such of the property acquired for performance of the contract as the parties may agree. This lien shall be paramount to all other liens and is effective immediately upon the first advancement of funds without filing, notice, or any other action by the Federal Government.
(Pub. L. 111350, § 3, Jan. 4, 2011, 124 Stat. 3791.)
## Notes
Historical and Revision Notes RevisedSectionSource (U.S. Code)Source (Statutes at Large) 450341:255(d).June 30, 1949, ch. 288, title III, § 305(d), 63 Stat. 396; July 12, 1952, ch. 703, § 1(m), 66 Stat. 594; Pub. L. 85800, § 4, Aug. 28, 1958, 72 Stat. 966; Pub. L. 103355, title II, § 2051(a)(4), (5), (d), Oct. 13, 1994, 108 Stat. 3304.