US lawMassachusettsRegulations540 CMR — Massachusetts Registry of Motor Vehicles540 CMR 21.00 — Semiannual safety inspection of school pupil transport vehicles21.04540 CMR 21.04Inspection DatesYear: 2026Length: 32 wordsOfficial source School pupil transport vehicles shall undergo two inspections each year; one to be performed during the month of October or November, and the other during the month of February or March. 3/9/18Previous540 CMR 21.03