Wis. Stat. § 302.445: Confinement of county jail prisoners in tribal jails.

The county board and the sheriff of any county may enter into an agreement with the elected governing body of a federally recognized American Indian tribe or band in this state for the confinement in a tribal jail of county jail prisoners. The sheriff retains responsibility for the prisoners for providing custody, care, treatment, services, leave privileges and food and determining good time as if they remained county jail prisoners, except that the sheriff may delegate, under the agreement, any of the responsibility to the tribal chief of police. The tribal jail is subject to s. 301.37 (4) but is not subject to the requirements for county jails unless otherwise provided under the agreement.