104. Where under these Rules any person is required to do any act or thing, or to sign any document or to make any declaration on behalf of himself or of any body corporate, or any document or evidence is required to be produced to or left with the Registrar, or at the Registry, and it is shown to the satisfaction of the Registrar that from any reasonable cause that person is unable to do any such act or thing, or to sign such document, or to make such declaration or that such document or evidence cannot be produced or left as aforesaid, it shall be lawful for the Registrar, and upon the production of such other evidence, and subject to such terms as he may think fit, to dispense with any such act or thing, signature, declaration, document or evidence.