Uniform Commercial Code (UCC): Primary federal law governing sales transactions, especially Article 2 for sale of goods. Covers contract formation, warranties, performance, and remedies.

Federal Trade Commission Act: Federal legislation that prohibits unfair or deceptive trade practices, affecting terms and representations in sales agreements.

Consumer Protection Laws: Federal and state laws protecting consumer rights, including disclosure requirements and cooling-off periods.

Antitrust Laws: Sherman Act and Clayton Act provisions preventing monopolistic practices and protecting competition in sales transactions.

Magnuson-Moss Warranty Act: Federal law governing warranties on consumer products, requiring clear disclosure of warranty terms.

State-Specific UCC Adaptations: Individual state modifications and interpretations of the UCC that may affect sales agreements in specific jurisdictions.

State Contract Laws: State-specific regulations governing contract formation, enforcement, and remedies.

Statute of Frauds: Legal requirement that certain contracts must be in writing to be enforceable, including sales of goods over $500.

Industry-Specific Regulations: Specialized rules and licensing requirements for particular industries or product types.

Title Transfer Requirements: Legal requirements for properly transferring ownership of goods or property in a sale transaction.

Tax Regulations: Sales tax, transfer tax, and income tax considerations that must be addressed in the sale agreement.

Property Laws: Regulations governing the transfer of personal and real property, including lien laws and recording requirements.