If the EPO has established an IPER on the application and the applicant wishes the application to proceed on the basis of claims which were not the subject of this IPER because they were not searched during the International phase because of an objection of lack of unity, he will be invited to pay further search fees under Rule 112 (see 7.11.1(ii) above and B-XII, 8(i)) for the inventions not searched and to additionally pay the difference between the full examination fee and the reduced examination fee as mentioned in Rule 107(2), if he wishes the application to be examined on the basis of an invention which was not the subject of the IPER. In that case, the applicant, after receipt of the further search report, must also indicate on the basis of which invention the application is to proceed.