StacksVerified U.S. regulatory reference

49 CFR §393.91

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
No bus shall be equipped with aisle seats unless such seats are so designed and installed as to automatically fold and leave a clear aisle when they are unoccupied. No bus shall be operated if any seat therein is not securely fastened to the vehicle.