7.—(1) A witness who resides outside Singapore and who travels by air to Singapore for the purpose of his attendance in court may be reimbursed his air fare on the basis of the economy class fare charged by the airline he has used, unless the prior approval of the authorising officer has been obtained for such witness to be reimbursed his air fare on the basis of a higher class of fare.
(2) Where a witness has travelled by a mode of transport other than by air, he may be reimbursed his travelling expenses on the basis of the normal economy charges for the mode of public ferry service or land transport used, unless prior approval otherwise has been granted by the authorising officer.
(3) Port charges or port taxes incurred by a witness may be reimbursed upon the relevant receipts or invoices being produced to the authorising officer.