If property within a taxation district is not assessed because of a vacancy in a county, city, village or town office, the department of revenue shall appoint a person certified under s. 73.09 to perform the functions of the office of assessor. If property taxes, special charges, special assessments or special taxes are not collected on property because of a vacancy in a city, other than a city authorized to proceed under s. 74.87, village or town office, the county treasurer shall perform the functions of taxation district treasurer.
Wis. Stat. § 74.75