Core changes: First, self-inspection legalization, user units as self-inspection subjects, equipped with certified personnel, establish processes; Second, dual-track inspection, self-inspection passed → institution inspection → issue use mark, all indispensable; Third, self-inspection content, covering 8 categories and 56 items including safety devices, door system, traction system, brake system; Fourth, record requirements, self-inspection records kept ≥5 years, traceable and retrospectively investigable; Fifth, legal liabilities, fines of 10,000–100,000 yuan for no self-inspection or false self-inspection, license revocation for serious cases.