The additional preliminary examination fee paid in response to an invitation to pay additional examination fees after a finding of lack of unity (Form PCT/IPEA/405, see GL/PCT‑EPO C‑V, 4.2) is collected by the IPEA/EP and its amount is fixed by the EPO. It is to be paid within one month from the date of the invitation. The amount payable is the amount applicable on the date of payment. For any reductions that may apply, see GL/PCT‑EPO A‑III, 8.4.1.[Rule 68.3; ]