Such costs should be calculated on the basis of each individual official control or on the basis of all official controls performed over a given period of time.
Ba cheart costais den sórt sin a ríomh ar bhonn gach rialaithe oifigiúil aonair nó ar bhonn na rialuithe oifigiúla ar fad arna ndéanamh thar thréimhse áirithe.