Pass certificates of an agent or rail operator to perform certain tasks or roles, with specific regard to the activities for the operation and safety. Authorisations concerning e.g. exercise regimens, the use of the central apparatus as well as the conduct of traction; they are obtained, and are renewable after specific education courses, assessments and exams. The license to carry out a specific task normally requires also periods of learning in the field and internships. See also Professional Education
Link... for your business