12.—(1) A request under section 10 or section 12(4) by a joint applicant shall be made on Patents Form 2/77 and shall be accompanied by a copy thereof and a statement in duplicate setting out fully the facts upon which he relies and the directions which he seeks.
(2) The comptroller shall send a copy of the request and statement to each other joint applicant who shall, if he wishes to oppose the request, within the period of two months beginning on the date when such copies are sent to him, file in duplicate a counter-statement setting out fully the grounds of his opposition; and the comptroller shall send a copy of the counter-statement to the person making the request and to each other joint applicant who is not party to the counter-statement.
(3) The comptroller may give such directions as he may think fit with regard to the subsequent procedure.