(1)    An elective official is the legal custodian of his or her records and the records of his or her office, but the official may designate an employee of his or her staff to act as the legal custodian.

   (2)   The chairperson of a committee of elective officials, or the designee of the chairperson, is the legal custodian of the records of the committee.

   (3)   The cochairpersons of a joint committee of elective officials, or the designee of the cochairpersons, are the legal custodians of the records of the joint committee.

   (4)   Every authority not specified in subs. (1) to (3) shall designate in writing one or more positions occupied by an officer or employee of the authority or the unit of government of which it is a part as a legal custodian to fulfill its duties under this subchapter. In the absence of a designation the authority’s highest ranking officer and the chief administrative officer, if any, are the legal custodians for the authority. The legal custodian shall be vested by the authority with full legal power to render decisions and carry out the duties of the authority under this subchapter. Each authority shall provide the name of the legal custodian and a description of the nature of his or her duties under this subchapter to all employees of the authority entrusted with records subject to the legal custodian’s supervision.

   (5)   Notwithstanding sub. (4), if an authority specified in sub. (4) or the members of such an authority are appointed by another authority, the appointing authority may designate a legal custodian for records of the authority or members of the authority appointed by the appointing authority, except that if such an authority is attached for administrative purposes to another authority, the authority performing administrative duties shall designate the legal custodian for the authority for whom administrative duties are performed.

   (6)   The legal custodian of records maintained in a publicly owned or leased building or the authority appointing the legal custodian shall designate one or more deputies to act as legal custodian of such records in his or her absence or as otherwise required to respond to requests as provided in s. 19.35 (4). This subsection does not apply to members of the legislature or to members of any local governmental body.

   (7)   The designation of a legal custodian does not affect the powers and duties of an authority under this subchapter.

   (8)   No elective official of a legislative body has a duty to act as or designate a legal custodian under sub. (4) for the records of any committee of the body unless the official is the highest ranking officer or chief administrative officer of the committee or is designated the legal custodian of the committee’s records by rule or by law.