A Practice Note discussing the Motor Carrier Act exemption from overtime pay under the federal Fair Labor Standards Act (FLSA), applicable to certain employees with qualifications and maximum hours of service subject to the authority of the US Secretary of Transportation. This Note addresses the requirements for exemption, including interstate commerce, safety-affecting activities, eligible employees, and the small vehicle exception for certain vehicles weighing 10,000 pounds or less. This Note does not address state law, which may impose different or additional requirements.