CHAPTER 23—CONTRACTS (§§ 431—443)
- § 431. Contracts by Member of Congress
 - § 432. Officer or employee contracting with Member of Congress
 - § 433. Exemptions with respect to certain contracts
 - [§ 434. Repealed.]
 - § 435. Contracts in excess of specific appropriation
 - § 436. Convict labor contracts
 - [§ 437. Repealed.]
 - [§§ 438, 439. Repealed.]
 - § 440. Mail contracts
 - § 441. Postal supply contracts
 - § 442. Printing contracts
 - § 443. War contracts