Wis. Stat. § 18.83: Redemption.

The commission may provide that higher education bonds may be presented for payment before maturity to any eligible educational institution for tuition, fees and other educationally related costs owed that eligible educational institution plus an allowance for other educationally related costs such as room and board, books and supplies and other miscellaneous expenses owed to any person except that eligible educational institution, subject to any requirement of the commission. The commission may treat higher education bonds presented for payment under this section as still outstanding, even though owned by the state, and the commission may resell such higher education bonds or fund or refund such higher education bonds through the issuance of other obligations. If obligations are issued to fund or refund such higher education bonds, such obligations shall be treated as issued for the purpose of funding, not refunding, for all purposes under this chapter and ch. 20.