SDCL § 5-25-2: Vehicle operation and mileage records--Report attached to claim for reimbursement.

Each office, department, institution, board, and agency of this state operating a state-owned passenger motor vehicle shall keep and maintain in its respective office:

(1) Accurate records of its cost of operation of the motor vehicle;

(2) Travel reports showing destination and miles traveled each day according to speedometer registration and the total speedometer mileage at the beginning and at the end of each travel period, together with all operating expenses incurred for that period.

A copy of such travel report shall be attached to the claim or claims presented for reimbursement of the travel expense covered thereby.