Any change, other than the rectification of obvious mistakes in the claims, the description or the drawings is considered an amendment. Unless withdrawn or superseded by later amendments, any change considered an amendment must be taken into consideration for the purpose of the international preliminary examination.[Art. 19; Art. 34(2)(b); Rule 66.5; GL/ISPE 20.04; ]

See GL/PCT‑EPO H-II and GL/PCT-EPO H‑III for details.