The method must be able to ensure that, for a specific reference period, the number of products obtained which could be considered as “originating” is the same as that which would have been obtained had there been physical segregation of the stocks.
Meetodiga peab olema võimalik tagada, et saadud või toodetud tooteid, mida võib pidada päritolustaatusega toodeteks, on teatava vaatlusperioodi jooksul sama suur hulk, kui oleks saadud kaubavarude füüsilisel eraldamisel.