 This prevents limitation from occurring where an opposition has already been lodged.If, at the time of filing a request for limitation or revocation, opposition proceedings are pending, the request "shall be deemed not to have been filed  (see section "Special cases" - below - for the case, "likely to be infrequent in practice", where an opposition is filed "following the valid lodging of a request for limitation or revocation" ).The request must be filed with the EPO and the procedure is subject to the payment of a fee.