No ammonia may be loaded into or unloaded from any tank truck, tank semi-trailer, or tank trailer unless the handbrake or other braker mechanism and wheel chocks on both sides of at least one drive wheel are securely set to prevent motion of the vehicle during the loading or unloading process.
Minn. R. agency 105, ch. 1513, SYSTEMS MOUNTED ON TRUCKS, SEMI-TRAILERS, AND TRAILERS FOR TRANSPORTATION OF AMMONIA, pt. 1513.0810
Statutory Authority: MS s 18C.121