41 USC § 4503 - Security for advance payments

---
identifier: "/us/usc/t41/s4503"
source: "usc"
legal_status: "official_legal_evidence"
title: "41 USC § 4503 - Security for advance payments"
title_number: 41
title_name: "PUBLIC CONTRACTS"
section_number: "4503"
section_name: "Security for advance payments"
chapter_number: 45
chapter_name: "CONTRACT FINANCING"
positive_law: true
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(Pub. L. 111–350, § 3, Jan. 4, 2011, 124 Stat. 3791.)"
---


# § 4503. Security for advance payments

section 4501 of this title

Advance payments under  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.

---

**Source Credit**: (Pub. L. 111–350, § 3, Jan. 4, 2011, 124 Stat. 3791.)

| RevisedSection | Source (U.S. Code) | Source (Statutes at Large) |
| --- | --- | --- |
| 4503 | 41:255(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. 85–800, § 4, Aug. 28, 1958, 72 Stat. 966; Pub. L. 103–355, title II, § 2051(a)(4), (5), (d), Oct. 13, 1994, 108 Stat. 3304. |