PCT Receiving Office Guidelines
Chapter XI: Fees
252. The receiving Office checks whether the fees due under Article 3(4)(iv) have been paid within the prescribed time limit.
253. The transmittal fee, the international filing fee and the search fee are payable within one month from the date of receipt of the international application by the receiving Office. The amount payable is the amount applicable on that date of receipt (Rules 14.1(c), 15.3 and 16.1(f)).
257. Regarding the fee for preparing and transmitting a priority document to the International Bureau, see Rule 17.1(b).