the minimum percentage of all official controls of operators or groups of operators that are to be carried out without prior notice as referred to in point (a) of paragraph 4;
an céatadán íosta de na rialuithe oifigiúla ar oibreoirí nó ar ghrúpaí oibreoirí is gá a dhéanamh gan fógra a thabhairt roimh ré dá dtagraítear i bpointe (a) de mhír 4;