R 408.42234 Caution sign.

Rule 2234. (1) A caution sign shall be used to warn of a potential hazard or to caution against an unsafe practice. (2) The proportions for a caution sign shall be not less than those prescribed in table 4 and the format of figure 2 shall be followed. (3) 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. (4) An employee shall be instructed that a caution sign indicates a possible hazard and that proper precautions shall be taken.