Age Discrimination Employment Act 1967 (ADEA): The ADEA is a federal law that protects workers over the age of 40 from discrimination when it comes to hiring, firing, pay, promotions, and other conditions of employment. The Act prohibits employers from making decisions based solely on an individual’s age and encourages fair treatment in all aspects of the workplace. As such, employers must provide equal opportunity regardless of age and cannot rely on age as the basis for any sort of decision-making.