Fair Labor Standards Act (FLSA): Federal law governing minimum wage requirements, overtime provisions, and employee classification (exempt vs. non-exempt status)

Title VII of the Civil Rights Act: Federal anti-discrimination law prohibiting employment discrimination based on race, color, religion, sex, and national origin

Americans with Disabilities Act (ADA): Federal law requiring reasonable accommodations for qualified employees with disabilities and prohibiting disability discrimination

Age Discrimination in Employment Act (ADEA): Federal law protecting workers 40 and older from age-based employment discrimination

Equal Pay Act: Federal law requiring equal pay for equal work regardless of gender

Immigration Reform and Control Act: Federal law establishing work authorization verification requirements for all employees

Internal Revenue Code Considerations: Federal tax regulations affecting employment classification and tax implications of compensation

State Labor Laws: State-specific requirements for minimum wage, overtime, and meal/rest breaks that may exceed federal standards

State Employment Laws: State-specific regulations regarding at-will employment, non-compete agreements, and paid sick leave

State Notice Requirements: Mandatory disclosures and specific language required by state law in employment documents

Clear Language Requirements: Best practice guidelines for ensuring unambiguous terms and easily understandable language in the addendum

Integration Clauses: Legal provisions defining the relationship between the addendum and original offer letter, including which terms supersede others

Documentation Requirements: Legal and practical requirements for signatures, acknowledgments, and record retention of employment documents