Where a farmer has received seed production aid, the amount shall be calculated by multiplying the number of tonnes for which such a payment has been granted, respectively, in each year of the reference period, by the amount per tonne established in application of Article 3 of Regulation (EEC) No 2358/71. Member States shall calculate the number of hectares to be included in calculation of the single payment proportionately to area accepted for certification for which the aid provided for in Article 3 of Regulation (EEC) No 2358/71 has been granted, respectively, in each year of the reference period, and within the limits of a base area to be fixed by the Commission on the basis of the total area accepted for certification as communicated to the Commission according to Regulation (EEC) No 3083/73. This total area shall not include the area accepted for certification for rice (Oryza sativa L.), spelt (Triticum spelta L.), and fibre and oil flax (Linum usitatissimum L.) and hemp (Cannabis sativa L.) that already has been declared for arable crops.
Kadar je kmet prejel pomoč za pridelavo semen, se znesek izračuna tako, da se število ton, za katero je plačilo odobreno v vsakem letu referenčnega obdobja, pomnoži z zneskom na tono, določeno pri uporabi člena 3 Uredbe (EGS) št. 2358/71. Države članice izračunajo število hektarjev, ki se vključi v izračun enotnega plačila, sorazmerno s površino, sprejeto za certifikacijo, za katero je bila določena pomoč v členu 3 Uredbe (EGS) št. 2358/71 v vsakem letu referenčnega območja in v okviru omejitev osnovne površine, ki jo določi Komisija na podlagi celotne površine, sprejete za certifikacijo, kot je sporočeno Komisiji skladno z Uredbo (EGS) št. 3083/73. Ta celotna površina ne vsebuje površine, sprejete za certifikacijo za riž (Oryza sativa L.), piro (Triticum spelta L.), ter vlakna in lan za olje (Linum usitatissimum L.) ter konopljo (Cannabis sativa L.), ki so že prijavljene za poljščine.