Where, under this Part a person is required to make a declaration on behalf of himself or of a body corporate, or any evidence is required to be produced to the Registrar; and it is shown to the satisfaction of the Registrar that from any reasonable cause that person is unable to make the declaration, or that the evidence cannot be produced, the Registrar may, with the approval of the Director-General and on the production of such other evidence, and subject to such terms as the Registrar may think fit, dispense with the declaration or evidence.