2.3 Instructions in Chapter A‑III ("Examination of formal requirements")
The renewal fees for a Euro-PCT application are due in respect of the third and each subsequent year, calculated from the date of filing of the Euro-PCT application as accorded by the receiving Office. If, according to Rule 51(1), the renewal fee for the third year fell due within the 31-month time limit for entry into the European phase, the due date is deferred and the fee may still be paid without surcharge up to expiry of the 31-month time limit (see A‑X, 5.2.4).