The defendant to a cross-appeal shall have a period of three months from the date on which he was notified of the application to intervene, failing which he shall be deemed inadmissible.
The intervener in the proceedings shall have a period of three months from the date on which he was notified of the application to intervene, failing which he shall be deemed inadmissible. A voluntary intervener shall have the same time limit, subject to the same penalty, from the date of his voluntary intervention.
Subject to the same penalty and within the same time limit, the defendant to a cross-appeal, the forced intervener and the voluntary intervener shall send their submissions, by registered letter with acknowledgement of receipt, to the Director General of the National Institute of Industrial Property, and provide proof thereof to the registry.