The applicant is obliged to indicate the basis in the application as originally filed for any amendments filed. If no such basis is indicated, the IPER may be established as if the amendments had not been made.

Together with the reply to the WO‑ISA, the WO-IPEA or the minutes of a telephone consultation, the applicant has, subject to certain exceptions (see GL/PCT‑EPO, C‑VII, 1(d)), the opportunity to submit (further) amendments under Art. 34 to the claims, description and/or drawings.

There is no right to amend the application until after the international search report has been established. Obvious mistakes, on the other hand, may be corrected (see GL/PCT‑EPO H-IV).

1. Introduction

2. Amendments before receipt of the search report

3. Amendments prior to the start of international preliminary examination

4. Further opportunity to submit amendments

5. Amended sheets

See ISPE Guidelines 13.14.