Uniform Commercial Code (UCC): Primary source of commercial law for goods-related contracts in the United States. Governs sales and other commercial transactions.

Common Law Contract Principles: Fundamental principles governing contract formation, including offer, acceptance, consideration, and mutual intent.

Statute of Frauds: Legal requirement that certain contracts must be in writing to be enforceable, including contracts for goods over $500 and contracts that cannot be performed within one year.

E-SIGN Act: Federal law ensuring the legal validity of electronic signatures and electronic records in interstate commerce.

Fair Labor Standards Act: Federal law establishing standards for employment-related agreements, including minimum wage, overtime pay, and recordkeeping.

Americans with Disabilities Act: Federal law requiring reasonable accommodations and accessibility considerations in various contexts, including contract documentation.

State Contract Laws: State-specific legislation governing contract formation, enforcement, and interpretation within each state's jurisdiction.

State Electronic Transaction Acts: State-level laws governing electronic signatures and records, often modeled after the Uniform Electronic Transactions Act (UETA).

Industry-Specific Regulations: Sector-specific laws and regulations that may affect contract terms and requirements (e.g., education, banking, healthcare).