Wis. Stat. § 231.09
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, which may be any trust company or bank in this state having the powers of a trust company. The bond resolution providing for the issuance of bonds so secured shall pledge the revenues to be received by the authority as a result of the terms of the financing referred to in the resolution, and may contain such provisions for protecting and enforcing the rights and remedies of the bondholders as are reasonable and proper and not in violation of law, including particularly such provisions as are specifically authorized by this chapter to be included in any bond resolution of the authority, and may restrict the individual right of action by bondholders. In addition, any bond resolution may contain such other provisions as the authority deems reasonable and proper for the security of the bondholders. All expenses incurred in carrying out the provisions of the bond resolution may be treated as a part of the cost of the operation of a project.
Wis. Stat. § 231.09