that the measures for the destruction of rats have been applied and stating the reasons for their application.
Art. 26. Vessels infected with cholera shall be subjected to the following measures:
1. Medical inspection.
2. The patients shall be immediately landed and isolated.
3. The other persons shall likewise be landed, if possible, and subjected, from the date of arrival of the vessel, to an observation or a surveillance whose duration shall vary according to the sanitary condition of the vessel and the date of the last case, without, however, exceeding five days.
4. The soiled linen, wearing apparel, and other articles of the crew and passengers which are considered by the health authority of the port as being contaminated shall be disinfected.
5. The parts of the vessel which have been occupied by cholera patients or which are considered by the health authority as being contaminated shall be disinfected.
6. The bilge-water shall be discharged after disinfection.
The health authority may order the substitution of good drinking water for that stored on board.
It may be forbidden to throw human excrements or allow them to run into the water of a port unless they are previously disinfected.
Art. 27. Vessels suspected of cholera shall be subjected to the measures prescribed under Nos. 1, 4, 5, and 6 of Article 26.
The crew and passengers may be subjected to a surveillance not to exceed five days from the arrival of the vessel. It is recommended that the landing of the crew be prevented during the same period except for purposes connected with the service.
Art. 28. Vessels uninfected with cholera shall be granted pratique immediately, whatever be the nature of their bill of health.
The only measures to which they may be subjected by the health authority of the port of arrival shall be those provided under Nos. 1, 4, and 6 of Article 26.
With regard to the state of their health, the crew and passengers may be subjected to a surveillance not to exceed five days from the date on which the vessel left the contaminated port.
It is recommended that the landing of the crew be forbidden during the same period except for purposes connected with the service.
The competent authority of the port of arrival may always demand an affidavit from the ship's physician or, in the absence of such, from the captain, to the effect that there has not been a case of cholera on board since the vessel sailed.
Art. 29. In order to apply the measures indicated in articles 21 to 28, the competent authority shall take account of the presence of a physician and
