Under the Fair Labor Standards Act (FLSA), what are workers' rights regarding unpaid overtime?

The Fair Labor Standards Act requires that non-exempt employees receive overtime pay of at least 1.5 times their regular rate for hours worked beyond 40 in a workweek. Exempt employees (executive, administrative, professional, and certain computer employees earning above a salary threshold, currently $684 per week) are not entitled to overtime. Employees cannot waive their FLSA overtime rights by agreement or by signing a policy; the protection is mandatory. Workers have a two-year statute of limitations to recover unpaid overtime (three years for willful violations), and successful claimants are typically entitled to back pay, an equal amount as liquidated damages, and attorney's fees.