7. Form of voucher and certificate of Head of Department
(1) All claims for subsistence allowance and travelling expenses shall be made out in the form from time to time approved by the Treasurer. The certificate to be given on the form shall be regarded, in every particular, as an honour certificate that the whole expenditure has been necessarily incurred in the interest of the public service, and that the various items of travelling or transportation expenses have been actually disbursed.
(2) The certificate of the Head of Department concerned shall imply that he or she has personally satisfied himself that the claim is reasonable and that the claimant was travelling on duty during the time specified. The certificate shall be in the form prescribed in Schedule 1 to these Regulations.