Wis. Stat. § 114.71
The authority may secure any bonds issued under this chapter by a trust agreement, trust indenture, indenture of mortgage, or deed of trust by and between the authority and one or more corporate trustees. The bond resolution providing for the issuance of bonds so secured shall pledge some or all of the revenues to be received by the authority, including to the extent permitted by law any grant, aid, loan, or other contribution, or shall mortgage, assign, or grant security interests in some or all of the property of the authority, or both, and may contain provisions for protecting and enforcing the rights and remedies of the bondholders that are reasonable and proper and not in violation of law. A bond resolution may contain any other provisions that are determined by the board to be reasonable and proper for the security of the bondholders.
Wis. Stat. § 114.71