(1) You must establish a location for tank car loading and unloading operations.

(2) You must assign employees and instruct them in the unloading of tank cars.

(3) You must make sure, when unloading cars, to set the brake and block the wheels.

(4) You must make sure the track of tank siding is level.

(5) You must place caution signs on the track or car to warn approaching persons of loading and unloading operations that are kept in place until the car is unloaded and disconnected from discharge connections.

(6) You must make sure these caution signs meet all of the following:

(a) Are made of metal or other suitable material.

(b) Are at least twelve to fifteen inches in size.

(c) Read either "stop-Tank Car Connected" or "stop-Men at Work" meeting the following criteria:

(i) "stop" at least four inches high;

(ii) All other words at least two inches high;

(iii) All with white letters on a blue background.