In accordance with the principle of the prevalence of the PCT, applicants should refer to the PCT International Search and Preliminary Examination Guidelines (GL/ISPE and ISPE Guidelines) for information on search and examination practice and procedure before the EPO as ISA, SISA and IPEA. In these procedures the Guidelines for Examination in the European Patent Office (GL/EPO) apply only to the extent that they can be applied in conformity with the supplementary role of the EPC in the international phase (see
point 16). Where the ISPE Guidelines give the International Authority a choice between different options, the EPO will follow the option most in line with its practice under the EPC as set out in
Annex IV (see
point 219).