GA C4.1.16 4.1.16.

What fees are due for the international preliminary examination? 
4.1.056
For international preliminary examination, the handling fee and the preliminary examination fee must be paid direct to the EPO as IPEA. The preliminary examination fee is set by the EPO. The handling fee is provided for in the Schedule of Fees under the PCT which is published by the IB.
Art. 31(5) PCT
R. 57.3, 58 PCT
WIPO PCT Guide 10.035-10.043 
4.1.057
Both fees have to be paid within one month of the date on which the demand was submitted or within 22 months from the priority date, whichever time limit expires later. The amounts of the handling fee and the preliminary examination fee to be paid shall be the amounts applicable on the date of payment.
4.1.058
Applicants are urged to use the Fee Calculation Sheet annexed to the demand form (PCT/IPEA/401). For the payment methods currently accepted by the EPO, see point 2.24.011.
Fee reductions
Consequences of non- or late payment of fees
Refund of the fee for international preliminary examination

Source: http://www.epo.org/applying/international/guide-for-applicants/html/e/ga_c4_1_16.html

Date retrieved: 17 May 2021

9 references found.

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EPO Guide for Applicants, part II Int.

EPO Guide for Applicants, part II Int. - C The EPO as ISA and SISA

PCT Articles

PCT Implementing Rules