A medical license is an occupational license that permits a person to legally practice medicine. Most nations require such a license, bestowed either by a specified government-approved professional association or a government agency. Licenses are not granted automatically to all people with medical degrees. A medical school graduate must receive a license to practice medicine to legally be called a physician. The process typically requires testing by a medical board. The medical license is the documentation of authority to practice medicine within a certain locality. An active license is also required to practice medicine as an Assistant Physician, a Physician assistant or a Clinical officer in jurisdictions with authorizing legislation.