R 408.13713 Caution signs.

Rule 3713. (1) A caution sign shall be used to warn of a potential hazard or to caution against an unsafe practice. (2) A caution sign shall have the signal word "caution" in yellow on a black background in the upper panel. The lower panel where additional wording may be used shall be black letters on a yellow background. (See examples in figure 2 and table 2.) (3) An employee shall be instructed that a caution sign indicates a possible hazard and that proper precautions shall be taken. (4) Figure 2 reads as follows: FIGURE 2 Caution Sign