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4. Disinfectants shall be–
(a)approved for use for the purposes of this Order and the Foot-and-Mouth Disease (Slaughter and Vaccination) (Scotland) Regulations 2006 by the Diseases of Animals (Approved Disinfectants) Order 1978(1);
(b)used at the concentration specified in that Order; and
(c)used in accordance with the manufacturer’s instructions or recommendations (if any) and in particular, if use is recommended before any date, used before that date.
S.I. 1978/32, amended by this Order; there are other amending instruments but none is relevant.