The speaker of the assembly, president of the senate, governor, secretary of state, attorney general, any court of record or the clerk thereof, any court of appeals judge or any justice of the supreme court may administer the oath of office to the members and officers of the legislature. The oath shall be filed with the secretary of state.
Wis. Stat. § 13.03
Oaths of members
1977 c. 187.
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.