Wis. Const. art. IV, § 23a

Every resolution or ordinance passed by the county board in any county shall, before it becomes effective, be presented to the chief executive officer. If he approves, he shall sign it; if not, he shall return it with his objections, which objections shall be entered at large upon the journal and the board shall proceed to reconsider the matter. Appropriations may be approved in whole or in part by the chief executive officer and the part approved shall become law, and the part objected to shall be returned in the same manner as provided for in other resolutions or ordinances. If, after such reconsideration, two-thirds of the members-elect of the county board agree to pass the resolution or ordinance or the part of the resolution or ordinance objected to, it shall become effective on the date prescribed but not earlier than the date of passage following reconsideration. In all such cases, the votes of the members of the county board shall be determined by ayes and noes and the names of the members voting for or against the resolution or ordinance or the part thereof objected to shall be entered on the journal. If any resolution or ordinance is not returned by the chief executive officer to the county board at its first meeting occurring not less than 6 days, Sundays excepted, after it has been presented to him, it shall become effective unless the county board has recessed or adjourned for a period in excess of 60 days, in which case it shall not be effective without his approval.