A travel expense voucher in the form prescribed by the Comptroller shall be used for all claims for travel expense, and each voucher shall contain the information required by this section. The voucher shall show purpose of travel, dates and items of expenditure, points between which travel occurred, and times of departure and arrival. If travel is by common carrier, the name of the common carrier shall be shown; if by auto, the statement of automobile travel shall be attached. The Comptroller may waive the submission of any information required by this section or may require the submission of other information reasonably required to determine any claim for travel expense reimbursement.