21.—(1) Irrespective of whether or not pigs are to be brought on to the premises again, the Welsh Ministers may serve a notice on an occupier requiring that occupier to carry out cleansing and disinfection of the premises specified in the notice, and failure to comply with the notice is an offence.
(2) The notice must specify a reasonable period within which the cleansing and disinfection must be carried out.
(3) If the notice is not complied with, the Welsh Ministers may arrange for it to be complied with, whether by officers of the Welsh Ministers or other persons, at the expense of the occupier.