(1) The Director General may prescribe forms to be used for the purposes of this Act and may authorise the use of a suitable substitute for any form so prescribed.

(2) Where in order to comply with any provision of this Act a person is required to use a prescribed form, he shall not be regarded as complying with that provision unless he uses all reasonable diligence to procure and use-

(a) a printed copy of the form so prescribed under subsection (1); or

(b) a copy of any substitute for the form authorised under subsection (1), being a printed copy unless the authorisation provides otherwise.