A decision on the EPC contracting states in which protection by way of a European patent is actually being sought need not be made until the application enters the European phase (see
points 412 ff). If a state accedes to the EPC after the international filing date, the EPO cannot act as a designated Office for the EPC contracting state concerned and no European patent can be obtained for that state. In this respect, the date of entry into the European phase is irrelevant.