When transporting Division 1.1, 1.2, or 1.3 explosives, a route plan must be _________.

If transporting Division 1.1, 1.2 or 1.3 (Class A or Class B) explosives, you must have a written route plan and follow that plan. Carriers prepare the route plan in advance and give the driver a copy. You may plan the route yourself if you pick up the explosives at a location other than your employer's terminal.
Write out the plan in advance. Keep a copy of it with you while transporting the explosives. Deliver shipments of explosives only to authorized persons or leave them in locked rooms designed for explosives storage.