The Prevention of Damage by Pests (Application to Shipping) Order 1951

3.—(1) Subject to the exceptions and modifications prescribed by this Order, the provisions of the Act shall apply in relation to any vessel which is not a sea-going ship as they apply in relation to land, but, except as provided in Part IV of this Order, shall not apply in relation to any sea-going ship:

Provided that none of the provisions of the Act relating to structural repairs or other works shall apply to any kind of vessel.

(2) A sea-going ship means:—

(a) any vessel employed in trading or going between a place in the United Kingdom, the Channel Islands or the Isle of Man, and a place not within the United Kingdom, the Channel Islands or the Isle of Man;

(b) any vessel (other than a vessel which is wholly or mainly engaged in trading or going within the limits of any harbour or haven or dock, or of any estuary or on any tidal or non-tidal river or inland waterway, or a vessel used for the purpose of storage) in respect of which the master holds either (i) a valid deratisation certificate or a valid deratisation exemption certificate satisfying the requirements of the Port Health Regulations, 1933 and 1945, or the Port Sanitary Regulations (Scotland), 1933 and 1945; or (ii) a certificate issued not more than 4 months previously in the form set out in the Schedule to this Order or in a form substantially to the like effect by the medical officer of a port health authority or port local authority certifying that the ship is so far as practicable free from rats and mice.