Wisconsin Statutes Employment, Compensation and Mining (Ch. 101 to 109) § 103.80. Inspection

(1) The department and school attendance officers shall visit and inspect at all reasonable times, and as often as possible, all places covered by ss. 103.64 to 103.82.

(2) The failure of any employer to produce for inspection by the department, or school attendance officers, a permit required for a minor under 16 years of age under s. 103.70 shall be prima facie evidence of unlawful employment of the minor. The presence of any minor in any factory, workshop or other place of employment shall be prima facie evidence of the employment of the minor.