Final answer:
Fire symbols can be used to indicate the load hazard both on-post and off-post, ensuring consistency in hazard communication during transportation of dangerous goods.
Step-by-step explanation:
The use of fire symbols to indicate the load hazard is allowed both on- and off-post. This means that the standard for marking hazards is consistent regardless of the location when it comes to dealing with potentially dangerous goods. When transporting such materials, proper identification using symbols is essential to ensure the safety of those transporting the materials and the public. Placards must be readily visible and available. It's important to note that specific regulations for transportation of hazardous materials may vary depending on the region and it is imperative to adhere to all local, state, and national guidelines.