8.
Basis for international preliminary examination 
The preliminary examination is based on the international application either as filed or as amended under Article 19 or 34 (see also GL/PCT-EPO C-III).

Art. 19 and 34
PCT Applicant's Guide Int. Phase, Annex E

The applicant must indicate on which basis he wishes the IPEA to start the international preliminary examination – application as originally filed or with amendments (Article 19 or Article 34), translations, comments about WO-ISA (indexed ISOREPLY) or about ISR, and, if applicable, a sequence listing in the language of the IPE. the application as originally filed or with amendments (Article 19 or Article 34); any translations; any comments about the WO-ISA (indexed ISOREPLY) or about the ISR; a sequence listing in the language of the IPE where applicable.

Additionally, a fee for preliminary examination and a handling fee are to be paid (see GL/PCT-EPO A-III, 7.1GL/PCT-EPO A-II, 7.1 and 7.2A-II, 7.2).

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