Iowa Code § 468.166
In any event where upon the request of the holder of any bond or bonds issued by any drainage district the board of supervisors shall fail, neglect or refuse to purchase the certificate of sale issued by the county treasurer and referred to in section 468.160 in manner and form as permitted by said section, the holder of such bond or bonds may, upon filing with the county auditor a sworn statement as to the making of such written request upon the board of supervisors and a recital of the failure of such board to act in the premises by complying with the provisions of said section, in the same manner and form purchase such certificate and the ownership thereof shall thereupon vest in such holder of such bond or bonds in trust for said drainage district or subdistrict, provided, however, that the holder shall have a lien upon said certificate and any beneficial interest arising therefrom for the holder's actual outlays including the holder's reasonable expenses and attorney's fees, if any, incurred in the premises. In the event any such holder of any bond or bonds shall acquire title the holder shall have a right to lease or convey said premises, upon giving thirty days' written notice to the board of supervisors by filing the same with the county auditor and in the event said board shall not approve said lease or sale, the same shall be referred to the district court of the county where the land is situated and there tried and determined in the manner prescribed in section 468.160. Any funds realized from the lease or sale of said land shall be first applied in extinguishing the lien of the holder of the certificate herein provided for and the balance shall be paid to the said drainage bond fund of said district.
Iowa Code § 468.166
89 Acts, ch 126, §2