Uniform Commercial Code (UCC): Primary body of law governing commercial transactions, especially Article 2 for sale of goods. Essential for establishing terms of vendor agreements.

State Contract Laws: State-specific contract laws that may affect the formation, execution, and enforcement of the vendor agreement in the relevant jurisdiction.

Federal Trade Commission Regulations: Federal regulations governing business practices, fairness in commerce, and consumer protection that may impact vendor relationships.

Sherman Act: Federal antitrust law prohibiting monopolistic business practices and anticompetitive agreements that could affect vendor relationships.

Clayton Act: Federal law supplementing the Sherman Act, addressing specific practices not explicitly covered by the Sherman Act.

Data Privacy Laws: Including GDPR, CCPA, and state-specific privacy laws that govern the handling and protection of sensitive information in vendor relationships.

Prompt Payment Act: Federal law requiring government agencies to pay vendors in a timely manner, relevant if government contracts are involved.

Intellectual Property Laws: Including Patent Act, Copyright Act, Trademark Act, and Trade Secret laws protecting intellectual property rights in vendor relationships.

Fair Labor Standards Act: Federal law establishing standards for employment including minimum wage and overtime, relevant if vendor services involve labor.

State Labor Laws: State-specific regulations governing employment relationships and contractor classifications that may affect vendor services.