register · resourcesThe reference shelf for the regimes the supply chain answers to.
Federal contractors and their suppliers work against a stack of domestic-content and prohibited-source regimes — Buy American, Section 889, the semiconductor rules taking effect in 2027, and more. This shelf explains what each one actually requires, maintained and re-dated as the rules change, every substantive claim traced to the statute, regulation, or Federal Register notice it comes from.
Not legal advice. Not a compliance call.
Each entry explains what a regime requires — the threshold, the named entities, the effective date — never whether a specific reader complies. That determination belongs to the contractor and its counsel, the same line Provenance holds. Every page shows the date it was last reviewed and cites its source.
Resources
- 01
Berry Amendment domestic sourcing requirement
The food, clothing, textile, tent, and hand-tool items 10 U.S.C. 4862 requires be 100% domestic, its dollar-threshold exception, the chemical-warfare-clothing carve-out, and how it differs from the Buy American Act and DFARS specialty metals.
last reviewed: 2026-07-31
- 02
Buy American Act domestic content thresholds
The percentage of a product's components that must be domestic to qualify under the Buy American Act, how that threshold rises through 2029, and what counts differently for COTS items.
last reviewed: 2026-07-31
- 03
DFARS specialty metals restriction
What counts as a specialty metal under 10 U.S.C. 4863, the six DoD end-item categories it attaches to, the melted-or-produced requirement, and the COTS, electronic-component, de minimis, and waiver exceptions.
last reviewed: 2026-07-31
- 04
NDAA Section 5949 covered semiconductors
What Section 5949 of the FY2023 NDAA prohibits, the three named Chinese semiconductor manufacturers it covers, its December 2027 effective date, and the proposed FAR rule's reasonable-inquiry standard.
last reviewed: 2026-07-31
- 05
Section 889 covered telecommunications equipment
What Section 889 of the FY2019 NDAA bars, the five named manufacturers it covers, the procurement-versus-use distinction between its two parts, and the waiver paths that remain open.
last reviewed: 2026-07-31
- 06
Trade Agreements Act thresholds and designated countries
When the Trade Agreements Act supersedes the Buy American Act, the WTO GPA and FTA dollar thresholds that trigger it, the substantial-transformation test that qualifies a product, and why a Chinese-origin product cannot qualify.
last reviewed: 2026-07-31