This manual contains the guidelines and procedures for public librarian certification and certification renewal in Wisconsin. Certification is not required for library personnel other than administrators, but nonadministrators may apply for certification at the level for which they are eligible. Requirements for voluntary library certification are in accordance with those for required certification. Voluntary certificates are granted for 5 years, and may be renewed. How to apply for certification is described in detail. Continuing education is among the requirements for recertification, as spelled out in the description of the renewal process. Appendixes describe the statutory authority for certification and present the application and renewal forms, as well as list some continuing education validators. (SLD)