21.—(1) An inspector executing this Order may mark any bird or other thing for identification purposes.
(2) An inspector executing this Order may require—
(a)the person in charge of any vehicle or equipment to cleanse and disinfect it, by serving a notice on him or her; and
(b)the detention and isolation of any vehicle, equipment or other thing, by serving a notice on the occupier of the premises where it is kept, or on the person in charge of it.
(3) A veterinary inspector executing this Order, or an inspector acting under his or her direction, may cleanse and disinfect any premises.
(4) A veterinary inspector executing this Order, or an inspector acting under his or her direction, may require—
(a)the cleansing and disinfection of any thing, by serving a notice on the occupier of the premises where it is kept, or on the person in charge of it;
(b)the cleansing and disinfection of any premises, by serving a notice on the occupier of the premises;
(c)the detention or isolation in a specified place of any animal or bird, by serving a notice on the occupier of the premises where it is kept, or on its keeper;
(d)the separation of any animal or bird from any other animal or bird, by serving a notice on the occupier of the premises where it is kept, or on its keeper.