PDFWAC 296-52-71105
Railway cars.
(1) Use of railway cars.
Explosives cannot be kept in a railway car unless:
(a) An emergency exists;
(b) Permission has been granted by the local authority;
(c) The railway car, its contents, and methods of loading are in compliance with U.S. DOT regulations (49 C.F.R. Chapter 1).
(2) Warning signs for railway cars not in transit.
(a) Any railway car containing explosives must have warning signs attached to every side of the car when it is:
(i) Stopped in transit; or
(ii) At its designation; and
(iii) No longer considered in interstate commerce.
(b) Warning signs must read "EXPLOSIVES—HANDLE CAREFULLY—KEEP FIRE AWAY."
The letters must be:
(i) Red;
(ii) At least one and one-half inches high;
(iii) On a white background.