Wis. Admin. Code § DOC 346.28 – Mail.

(1) The facility shall not limit the amount of correspondence sent and received by youth.
(2) The facility shall deliver incoming mail to youth on the same day that it is received at the facility.
(3) Outgoing youth mail shall be posted daily excluding weekends and holidays.
(4) Appropriate writing materials shall be provided to youth upon request.
(5) Postage for a minimum of 2 non-privileged letters a week shall be provided for each youth.
(6) Postage for privileged mail may not be limited.
(7) The facility shall establish parameters for inspecting privileged and non-privileged mail.
(8) If mail is withheld, staff shall inform the youth and document the date, time, reason, and disposition.