This document provides an overview of requirements for obtaining a Commercial Driver License (CDL) and related topics: - A CDL is required to operate vehicles over 26,001 GVWR, combination vehicles over 26,001 GVWR with trailers over 10,001 GVWR, vehicles carrying 16 or more passengers, or vehicles transporting hazardous materials. - Formal truck driver training is recommended to safely operate commercial vehicles and is the most reliable way to learn skills required for the profession. - The document reviews testing requirements and disqualifying offenses for CDLs. - International agreements allow motor carriers to operate across borders by licensing vehicles and reporting fuel taxes to jurisdictions.