Regulation 9
Where a person intending to leave an aircraft at a customs airport is suffering, or the medical officer suspects that he is suffering, from an infectious disease or tuberculosis, the medical officer may—
in the case of an infectious disease, cause such person on leaving the aircraft to be isolated, or to be sent to a hospital or to some other suitable place approved for that purpose by the responsible authority, as may be appropriate; or, except as provided in regulation 21, the medical officer may, by notice in writing to the commander, prohibit the person from leaving the aircraft without the consent in writing of the medical officer;
in the case of tuberculosis, if the person leaves the aircraft, send information to that effect to the medical officer for the area in which the intended destination and address of the person is situated.
Where the Secretary of State is satisfied that a grave danger to public health exists by reason of infectious disease and notifies medical officers accordingly, the medical officer may, and if the Secretary of State so directs shall, require a person leaving an aircraft at a customs airport to state in writing his name and intended destination and address.