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35. Control tests shall be carried out each day that a test is initiated using –
(a)Salmonella java NCTC 5706 or equivalent no more than 28 days old at the time of use;
(b)Erwinia herbicola NCTC 9381 or equivalent not more than 28 days old at the time of use; and
(c)processed animal protein or compost or digestion residue which is free of Salmonella java.