Michigan Compiled Laws, Chapter 289. Pure Foods and Standards § 289.8103

Sec. 8103. (1) All bulk displays of unpackaged food and drink offered for sale at a retail food establishment, including salad bars, which contain a detectable amount of sulfiting agents shall be prominently placarded with a sign which is clearly visible to the customer and which declares either of the following statements:

(2) All letters on the sign shall be of the same type style and color, not less than 1/4 inch in height, and of a color in clear contrast to the background. A smaller type size may be permitted if the department determines space is not available for the placard and the largest type size possible is used. If a retail establishment has multiple bins of sulfite-treated food which are segregated, 1 placard listing all of the applicable products is acceptable if it is placed at approximately eye level over the bins.