Wisconsin Statutes Vehicles (Ch. 340 to 351) § 341.18. Evidence of registration to be displayed on vehicles registered under quarterly or consecutive monthly systems; operation without display of registration prohibited

(1) A vehicle registered under s. 341.30 or 341.305 may not be operated on the highway without evidence of registration in the form required by the department displayed on or in the vehicle as required by the department, unless the vehicle has been authorized to operate under s. 341.19.

(2) If a person claims as a defense to a citation for failure to display evidence of registration that the person has made application for annual registration as provided in s. 341.04(1)(bm)2. and no such application was submitted to the department and the person is convicted of operating the vehicle without registration, the person shall be required to pay the full annual fee upon registration of the vehicle, notwithstanding the eligibility of the vehicle for registration under s. 341.30 or 341.305. The court or the department shall order the annual registration under s. 341.04(3)(c).