(4)For new pro forma models, there is not yet a monthly average outstanding notional amount that can be used to allocate the cost proportionally over all counterparties that use that new pro forma model. It is therefore appropriate, for the first year in which the new pro forma model is used, to charge those counterparties an equal and fixed fee per new pro forma model. Article 11(12a), second subparagraph, of Regulation (EU) No 648/2012, however, gives the EBA six months after the receipt of the application for validation of such new pro forma model to validate that model, which means that it is possible that a pro forma model is only validated in the year following the application for validation. The EBA should therefore be able to charge the fixed fee also for the year in which the pro forma model is actually validated. For the years following the one in which the first validation is granted, a steady state methodology for the determination of fees due should be established.