§4.15.3 Placards and UN numbers on a large means of containment

4.15.3 A placard, or a placard and UN number, must be displayed on each side and on each end of a large means of containment, except that

(a) in the case of a large means of containment that is permanently connected to a frame, such as a truck frame or a supporting frame for the means of containment, the placard, or the placard and UN number, may be displayed on the frame if the resulting position of the placard, or the placard and UN number, is equivalent on each side and on each end of the means of containment;