Wis. Admin. Code NR § 216.31
A permittee who will no longer control the permitted industrial facility may request that permit coverage be transferred to the person who will control the industrial facility. The transfer request shall be completed on forms provided by the department as specified under s. NR 216.006 and signed by both the permittee and the new owner or operator. If the permittee's signature cannot be obtained, the new owner or operator shall apply for coverage as specified under s. NR 216.22. The department may require additional information including a notice of intent to be filed prior to transferring permit coverage. Coverage is not transferred until the department sends notification of transfer approval to the new owner or operator.
Wis. Admin. Code Department of Natural Resources § NR 216.31