Restitutio in integrum. 1. The applicant for or proprietor of a Community trade mark or any other party to proceedings before the Office who, in spite of all due care required by the circumstances having been taken, was unable to observe a time limit vis-æ-vis the Office shall, upon application, have his rights re-established if the non-observance in question has the direct consequence, by virtue of the provisions of this Regulation, of causing the loss of any right or means of redress. ... 3. The application must state the grounds on which it is based and must set out the facts on which it relies. It shall not be deemed to be filed until the fee for re-establishment of rights has been paid.