Which of the following is required when loading or unloading explosives?

EXPLOSIVES LOADING AND UNLOADING RULES are among the most strict in hazmat transport because of the catastrophic consequences of ignition. REQUIRED PRACTICES: SHUT ENGINE OFF during loading and unloading of Division 1.1, 1.2, and 1.3 explosives (most dangerous classes); exception: refrigerated units on the trailer may remain running if they are separated from the cargo area; NO SMOKING within 25 feet of the vehicle during explosive loading/unloading — this applies to all personnel, not just the driver; NO SPARKS — metal tools that could create static sparks must not be used; use only non-sparking tools where required; AUTHORIZED PERSONNEL ONLY — only persons directly involved in the operation should be present; bystanders must be kept away; NO OPEN FIRE OR FLAME within 25 feet; NO HEATERS inside a vehicle carrying explosives; CARGO MUST BE PROPERLY BLOCKED — explosives must be properly secured to prevent movement and friction; CLASS 1 LABELING: Explosive cargoes require specific placards (Explosives 1.1, 1.2, 1.3, or 1.4) and the shipment requires the driver to have a written route plan approved by appropriate authorities for Class 1.1/1.2/1.3 shipments. EMERGENCY SCENARIO: If a fire starts near explosive cargo during loading, evacuate immediately — do not attempt to fight a fire involving explosives.