33. Assessment of owners or charterers of ships or aircraft who are not residents of the Republic
(1) Any person other than a resident who embarks passengers or loads livestock, mails or goods in the Republic, as an owner or charterer of any ship or aircraft, shall be deemed to have derived therefrom (apart from any taxable income derived by him from other sources) a taxable income of 10 per cent of the amount payable to him or to any agent on his behalf, whether the amount be payable in or outside the Republic, in respect of passengers, livestock, mails and goods so embarked or loaded, but the provisions of this section shall not apply to any such person who renders accounts which satisfactorily disclose the taxable income derived by him from the embarking of passengers or the loading of livestock, mails and goods as aforesaid.
(2) Where the person so embarking passengers or loading livestock, mails or goods has no recognized agent in the Republic other than the master of the ship or the pilot of the aircraft in connection with which any such amounts are payable, or where the agent fails to make returns of any such amounts payable in respect of any ship or aircraft –
(a) the Commissioner may make the assessment from such information as may be available to him;
(b) the tax thereon shall be payable to the Commissioner prior to the clearance of the ship or aircraft;
(c) the principal officer of customs at the port or airport where such ship or aircraft is being cleared shall have power to detain the clearance until such payment is made; and
(d) upon such payment the master, pilot or agent (as the case may be) shall be entitled to a certificate from such officer of customs that the amount so paid has been paid under the provisions of this Act, and such certificate shall be sufficient warrant to such master, pilot or agent of the amount so paid.