GCOR General Code of Operating Rules VIP Certification Exam

GCOR — The GCOR (General Code of Operating Rules) is published by the Association of American Railroads (AAR) and adopted by many Class I railroads in North America; employees (engineers, conductors, trainmen) are tested by their individual railroad on GCOR rules compliance — there is no single centralized certification body, but individual railroad rule exams are typically 80–100 questions at an 80% passing threshold.