Wis. Stat. § 97.09
Sub. (1) is shown as affected by 1983 Wis. Act 536, which adds "or this chapter". The effective date of Act 536, is shown in Section 4 as follows:
Section 4. Effective date. This act takes effect on the first day of the 3rd month commencing after the governor certifies, by executive order directed to the secretary of agriculture, trade and consumer protection and published in the official state newspaper, that all states contiguous to the borders of this state have in effect milk content requirements identical to those requirements created by this act.