State-Specific Mechanics Lien Laws: Each state has its own mechanics lien statutes, with varying requirements for lien waivers. Some states mandate statutory forms and prohibit advance lien waivers. These laws form the primary legal framework for lien waivers.

Federal Miller Act: United States Code Title 40 (Miller Act) governs payment bonds and rights on federal construction projects, which can affect how lien waivers are handled on federal projects.

Federal Bankruptcy Laws: Bankruptcy laws can affect lien rights and the enforceability of lien waivers, particularly in cases where a party files for bankruptcy protection.

Uniform Commercial Code: Article 9 of the UCC regarding secured transactions and provisions affecting priority of liens must be considered when drafting lien waivers, especially in commercial contexts.

State Construction Laws: Include prompt payment acts, contractor licensing requirements, and construction trust fund statutes that can affect the validity and enforcement of lien waivers.

Contract Law Principles: Basic contract law elements including consideration requirements, contract formation elements, and enforceability requirements must be incorporated into the waiver document.

State Documentation Requirements: State-specific requirements for notarization, witness signatures, recording requirements, and timing of waivers must be strictly followed for the waiver to be valid.

Fair Debt Collection Practices Act: Federal legislation that must be considered if the lien involves a consumer debt, affecting how the waiver can be presented and executed.