Rule 8

For the purposes of Article 13(1)(c), the period during which the request for renewal may be presented and the renewal fee may be paid shall start at least six months before the date on which the renewal is due and shall end at the earliest six months after that date. If the request for renewal is presented and/or the renewal fees are paid after the date on which the renewal is due, any Contracting Party may subject the acceptance of the request for renewal to the payment of a surcharge.