Wisconsin Statutes Insurance (Ch. 600 to 655) § 632.747. Guaranteed acceptance

(1) Employee becomes eligible after commencement of coverage. Unless otherwise permitted by rule of the commissioner, if an insurer provides coverage under a group health benefit plan, the insurer shall provide coverage under the group health benefit plan to an eligible employee who becomes eligible for coverage after the commencement of the employer's coverage, and to the eligible employee's dependents, regardless of health condition or claims experience, if all of the following apply:

(3) State or municipal self-insured plans. If the state or a county, city, village, town or school district provides coverage under a self-insured health plan, it shall provide coverage under the self-insured health plan to an eligible employee who waived coverage during an enrollment period during which the employee was entitled to enroll in the self-insured health plan, regardless of health condition or claims experience, if all of the following apply: