(1) Subject to the authority and regulations of the department and in cooperation with the federal government, the department shall:
(a) adopt rules necessary to carry out the purposes of this part; and
(b) administer or supervise all child welfare services of the state.
(2) The department division responsible for administering child welfare services shall require all employees hired as district supervisors or supervisors of field staff to complete annual child welfare supervisory training.
(3) The annual child welfare supervisory training may be made available to qualifying child protection specialists who demonstrate an interest and aptitude in becoming a supervisor in the child protection system.