(820 ILCS 125/10) (from Ch. 48, par. 198.10)
    Sec. 10. If at any time after a directory minimum fair wage order has been in effect for nine months the Department is of the opinion that the persistent non-observance of such order by one or more employers is a threat to the maintenance of fair minimum wage standards in any occupation or occupations, it may give notice of intention to make such order mandatory and of a public hearing to be held not sooner than fifteen nor more than thirty days after such publication at which all persons in favor of or opposed to a mandatory order may be heard. After such hearing, the Department, if it adheres to its opinion, may make the previous directory order or any part thereof mandatory and so publish it.
(Source: Laws 1945, p. 814.)