Wisconsin Statutes Vehicles (Ch. 340 to 351) § 348.28. Permits to be carried

(1)(a) Permits issued under ss. 348.25, 348.26 and 348.27, other than a permit described in s. 348.27(19)(b)5. b., shall be carried on the vehicle during operations so permitted.

(b) Permits issued under s. 348.27(19) that are required to be carried on the vehicle under par. (a) may be carried and produced in either printed or electronic format, including by display of electronic images on a cellular telephone or other electronic device. If the permit is displayed in electronic format on any cellular telephone or other electronic device, a traffic officer or inspector under s. 110.07(3) may not view, and producing the permit in electronic format is not considered consent for the traffic officer or inspector to view, any content on the telephone or other device except the permit.