Regulation 23

Without prejudice to any other provision in these regulations, the additional measures in Schedule 2 shall be applicable on the arrival at a customs airport of—

(a)

any infected aircraft or suspected aircraft;

(b)

any aircraft which has during its voyage been in an area infected with plague, cholera, yellow fever, lassa fever, rabies, viral haemorrhagic fever or marburg disease;

(c)

any suspect for smallpox on an aircraft other than an infected aircraft;

(d)

any other aircraft or person, when the authorised officer is satisfied that, notwithstanding that measures equivalent to such additional measures have been applied to the aircraft or person previously during its voyage, there is on board or has been on board since such previous application an infected person or suspect and that it is necessary again to apply any such measure, or the authorised officer has reasonable grounds for believing that such previous application was not substantially effective.