The mileage allowance paid to State employees for the use of privately owned vehicles shall be in lieu of all expenses connected with the operation of the vehicle including but not limited to operating costs, depreciation, parking fees, tolls, et cetera. Provided, however, the employee may be reimbursed for storage or parking charges when it is necessary that the vehicle be left at a hotel, airport, or like facility.
S.C. Code Regs. § 19-101.10