(1)    Public librarians. The division shall issue certificates to public librarians and promulgate, under ch. 227, necessary standards for public librarians. The qualifications for public librarians shall be based on education, professional training and experience. Any relevant instruction, as defined in s. 440.075 (1), that an applicant for a certificate has obtained in connection with any military service, as defined in s. 111.32 (12g), counts toward satisfying any requirement for instruction for a certificate under this subsection if the applicant demonstrates to the satisfaction of the division that the instruction obtained by the applicant is substantially equivalent to the instruction required for the certificate. Certificates already granted prior to December 17, 1971, shall remain in effect.

   (2)   Public library systems. The division, by rule, may promulgate necessary standards for public library systems. If promulgated, such rules shall be consistent with s. 43.15 and shall be established in accordance with ch. 227, except that the division shall hold a public hearing prior to adoption of any proposed rule. In addition to the notice required under s. 227.17, the division shall endeavor to notify each public library of such public hearings.