Artikel 27

1. If clinical signs or symptoms and information based on fact or evidence of a public health risk, including sources of infection and contamination, are found on board a conveyance, the competent authority shall consider the conveyance as affected and may:
a) disinfect, decontaminate, disinsect or derat the conveyance, as appropriate, or cause these measures to be carried out under its supervision; and
b) decide in each case the technique employed to secure an adequate level of control of the public health risk as provided in these Regulations. Where there are methods or materials advised by WHO for these procedures, these should be employed, unless the competent authority determines that other methods are as safe and reliable.
The competent authority may implement additional health measures, including isolation of the conveyances, as necessary, to prevent the spread of disease. Such additional measures should be reported to the National IHR Focal Point.
2. If the competent authority for the point of entry is not able to carry out the control measures required under this Article, the affected conveyance may nevertheless be allowed to depart, subject to the following conditions:
a) the competent authority shall, at the time of departure, inform the competent authority for the next known point of entry of the type of information referred to under subparagraph b); and
b) in the case of a ship, the evidence found and the control measures required shall be noted in the Ship Sanitation Control Certificate. Any such conveyance shall be permitted to take on, under the supervision of the competent authority, fuel, water, food and supplies.
3. A conveyance that has been considered as affected shall cease to be regarded as such when the competent authority is satisfied that:
a) the measures provided in paragraph 1 of this Article have been effectively carried out; and
b) there are no conditions on board that could constitute a public health risk.