The superintendent, whenever any matter is referred to him under the Motor Vehicle Assigned Risks Law [59A-32-1, 59A-32-3 to 59A-32-13 N.M. Stat. Ann.], shall review all information available to him and relating to the matter, including information available to him and relating to the matter, including information available to him from his records, the records of the motor vehicle division of the transportation department and other sources, and based upon his consideration of such information and the record of any hearing which he may in his discretion call and conduct informally, the superintendent, in his reasonable discretion, may: refuse to approve any application for assignment of risk; approve the rejection of any application by any insurer concerned; refuse to approve the renewal to reassignment of an existing policy; or take such other action as he shall determine to be fair and reasonable under all the circumstances. All testimony and other evidence on which the superintendent bases any action under the Motor Vehicle Assigned Risks Law shall be filed of record in the insurance department. Any such action by the superintendent shall be by order in writing, directed to the parties affected and filed of record in the insurance department.