Section 4
SEC. 4. Hereafter actual and necessary traveling expenses only shall be allowed to any person holding employment or appointment under the Government of the Philippine Archipelago, and all allowances in excess of the amount actually paid, except as herein provided, are declared illegal, and no credit shall be allowed to any of the disbursing officers of the Government of the Philippine Archipelago for payments or allowances in violation of this provision: Provided, That nothing herein contained shall be construed to prohibit the payment of a per diem in lieu of actual expenses.