(1) All ground ambulances must have or meet the following specifications: 

(a) the word "ambulance" must be affixed in mirror image in reflectorized lettering at least four inches tall, centered above the grill on the front of the vehicle; and

(b) the word "ambulance" must be affixed to the rear of the vehicle in reflectorized lettering at least four inches tall.

(2) The required markings may not appear on nonlicensed ambulances, with the exception of those ambulances temporarily in transit within the state.

(3) All oxygen cylinders must be secured so that they will not roll, tip over, or become projectiles in the event of a sudden vehicular maneuver.

(4) All ground ambulances must meet the requirements set forth under Table 9 of the Emergency Medical Services Rule Appendix.