However, where, in the case of interbranch organisations, the determination of the proportion of the volume of production, or of trade in, or of processing of the product or products concerned gives rise to practical difficulties, a Member State may lay down national rules for determining the specified level of representativeness referred to in point (a)(ii) of the first subparagraph.
I gcás eagraíochtaí idirchraoibhe, áfach, agus go n-eascraíonn deacrachtaí praiticiúla as cion toirt an táirgthe lena mbaineann a chinneadh, nó as cion toirt na trádála sa táirge nó sna táirgí nó as cion toirt phróiseáil an táirge nó na dtáirgí, féadfaidh Ballstát rialacha náisiúnta a leagan síos lena chinnfear leibhéal sonraithe an ionadaíochais dá dtagraítear i bpointe (a)(ii) den chéad fhomhír.