The secretary shall have the exclusive authority to employ a chief counsel and such staff attorneys and support staff as are necessary to represent the department in legal matters, condemnation procedures, and other such litigation. Any extra legal services that may be required shall be performed by attorneys selected by the secretary. The department is authorized to retain independent adjusters for purposes of investigating and adjusting claims and suits resulting from motor vehicle damage and personal injury damage programs involving department liability exposure and recovery potential. Expenses for the administration and implementation of this section shall be paid for from the state highway fund.