pratique authorizes the vessel to transit the Canal, to dock, to communicate with the shore, to take on and discharge passengers and cargo, and to do such other things as are legal and customary. Provisional pratique authorizes the vessel to do, or requires it to abstain from doing, certain things which are specifically set forth in writing by the quarantine officer. Failure to conform to the conditions of the provisional pratique shall render it null and void and the vessel shall at once return to its previous status.

REGULATION 108.1. Supplementary Inspections: After provisional pratique has been granted, the quarantine officer, or his authorized assistant, shall make such supplementary inspections as he deems necessary to see that instructions issued in the provisional pratique have been carried out.

REGULATION 108.2. All Cases of Illness to be Reported: Every case of illness occurring on board any vessel in Canal Zone waters or in the ports of Panama or Colon, Republic of Panama, whether the ship be in quarantine or not, shall be reported immediately by the master of the vessel to the quarantine officer.

REGULATION 108.3. Quarantine Guards: At the discretion of the quarantine officer, quarantine officers or quarantine guards may be placed on any vessel while in Canal Zone waters or in the ports of Panama and Colon, Republic of Panama.

REGULATION 108.4. Responsibility of Master When Guards are Present: At all times while a vessel is in Canal Zone waters or in the ports of Panama or Colon, Republic of Panama, the master is strictly responsible for the observation of quarantine rules and regulations affecting his vessel, cargo, crew or passengers, even though there may be quarantine officers or guards on board.

RULE 109. Pratique Without Inspection for Naval Vessels: Vessels of the naval service of any nation may, at the discretion of the Chief Quarantine Officer, be granted free pratique without quarantine inspection under the following conditions: The Commanding Officer of the vessel or vessels shall address a request for such pratique to the Chief Quarantine Officer in time to have such request reach that officer between the hours of 8 a. m. and 4 p. m. on the day before pratique is desired; the request shall contain a statement that there is no quarantinable disease aboard, and shall give the names of the ports visited within the last 10 days, the complement of the vessel or vessels, and the condition of health of such complement; the Commanding Officer shall file with the quarantine officer of the port, within 12 hours after entering Canal Zone waters, a certificate, signed by the senior Medical Officer and approved by the Commanding Officer,

embodying the information given in the request. Pratique shall not be considered as granted until reply to that effect has been received from the Chief Quarantine Officer by the Commanding Officer of the vessel or vessels concerned.

RULE 110. Pratique Without Inspection for Vessels Other Than Naval Vessels: At the discretion of the Chief Quarantine Officer, provisional pratique may be granted to vessels other than naval vessels, under the following conditions: The master of the vessel shall address a request for such pratique to the Chief Quarantine Officer in time to have such request reach that officer between the hours of 8 a. m. and 4 p. m. on the day before pratique is desired; the request shall give the names of the ports visited in the last 10 days, and shall contain a statement that there is no sickness on board and that the vessel intends to transit the Canal without taking on or landing either cargo or persons. Such provisional pratique shall not be considered as granted until reply to that effect has been received from the Chief Quarantine Officer by the master of the vessel concerned.

RULE 111. Certificate of Pratique: Before a vessel shall be allowed to proceed through the Panama Canal or to leave a port of the Canal Zone, the quarantine officer shall furnish to the master of the vessel a Certificate of Pratique, or its equivalent in the form of a radio message.

RULE 112. Detention of Vessels in Quarantine: A vessel may be detained in quarantine under the following conditions: If there is quarantinable disease on board, or if there has been such disease on board during the voyage; if the quarantine officer believes the vessel or its crew, passengers or cargo, to be infected with quarantinable disease; if the vessel has received on board any person or article from another vessel subject to quarantine; if the quarantine officer considers that the conditions on the vessel in any other respects are such as to endanger the health of persons or animals in the Canal Zone or the cities of Panama and Colon, Republic of Panama. The period of detention in quarantine shall be that which the Chief Quarantine Officer considers necessary.

RULE 113. Detention of Persons and Cargo in Quarantine: The quarantine officer is hereby authorized to detain in quarantine, either on board the vessel or in a quaratine station, any or all of the crew and passengers of a vessel, and any other person whom he may consider to have been exposed to infection with quarantinable disease; and also to detain in quarantine, either on board the vessel or in some other place designated by him, any or all cargo which, in his opinion, is infected with quarantinable disease.

REGULATION 113.1. Special Communicable Diseases: Persons in quarantine infected with any communicable disease not specified as quarantinable, as well as those exposed to infection from such persons, may be detained until disposition has been directed by the Chief Health Officer.

REGULATION 113.2. Removal of Sick to Hospital: The Chief Quarantine Officer is authorized to remove persons sick in quarantine to any hospital for the purpose of diagnosis or treatment, and to instruct the superintendent of such hospital that those having a quarantinable disease shall be held in strict isolation until sufficient time has elapsed to ensure freedom from danger of spreading infection.

REGULATION 113.3. Release from Detention: When the necessity for detention has been determined, no one shall be released until the prescribed detention period has expired, unless such release is directed by the Chief Quarantine Officer.

REGULATION 113.4. Responsibility for Expense: Subsistence, lodging, and hospital care of crews or passengers detained in quarantine shall be at the expense of the interest controlling the vessel.

REGULATION 113.5. Disposition of the Dead: The body of a person who has died of quarantinable disease during the voyage, or after arrival in quarantine, shall be disposed of in such manner as the Chief Quarantine Officer may direct.

RULE 114. Removal of Cargo: The quarantine officer is hereby authorized to cause the removal of any or all cargo from a vessel when he considers such removal necessary to effect fumigation or disinfection of either the cargo or the vessel.

RULE 115. Quarantine Stations: There will be maintained within the Canal Zone one or more quarantine stations which shall be under the jurisdiction of the Quarantine Division. No person or article shall be allowed to enter a quarantine station without authority of the quarantine officer, and no person or article which has been detained in a quarantine station shall depart or be removed therefrom without authority of the quarantine officer.

RULE 116. Quarantinable Diseases: For the purpose of these Rules the quarantinable diseases of persons are cholera, yellow fever, smallpox, typhus fever, leprosy, plague and anthrax, and the quarantinable diseases of animals are glanders, anthrax, tuberculosis, foot and mouth disease, contagious pleuro-pneumonia, rinderpest and surra, together with such other diseases of men and animals as from time to time may be declared to be quarantinable by the Governor.

REGULATION 116.1. Duration of Quarantine: When detention of persons is considered necessary, this detention will be of such duration

that the total time from the last possible date of infection to the conclusion of the detention period will equal the recognized incubation period of the disease in question, which, for the purpose of these regulations, is as follows: Cholera, 5 days; yellow fever, 6 days; bubonic plague, 7 days; smallpox, 14 days; typhus fever, 12 days; leprosy and anthrax, indefinite.

REGULATION 116.2. Cholera: A vessel arriving from a cholera infected port may be considered free from infection if (a) the duration of the voyage from the infected port has been over five days and no suspicious sickness has appeared since sailing, and (b) the vessel has taken such special care at the infected port as to prevent the water and food supply from becoming infected. It will be considered (a) suspected if the necessary precautions as regards food and water have not been carried out, and (b) infected if cases of cholera have occurred on board. Suspected vessels will be treated to insure the sterilization of food, water, or other agencies that may carry cholera, and all persons who have been exposed to infection will be examined for the detection of cholera carriers. Infected vessels will be treated as directed by the Chief Quarantine Officer. The sick will be removed to an isolation hospital, and the remaining passengers and crew will be detained, segregated into as small groups as possible, and after 24 hours examined for the detection of cholera carriers. If no carriers are found, passengers and crew not directly exposed may be released at once. Carriers will be isolated until found negative on three consecutive days and contacts with carriers will be held five days from date of contact.

REGULATION 116.3. Yellow Fever: A vessel arriving from a yellow fever infected port may be considered free from infection if no yellow fever carrying mosquitoes are found on board and if, at the infected port, (a) precautions have been taken to prevent the propagation of these mosquitoes by guarding tanks, water buckets, and other collections of fresh water about the vessel in such a manner that they shall not become breeding places for mosquitoes; (b) the crew and passengers in transit have not landed and no one has embarked; (c) the vessel has lain at an anchorage where it will be impossible for the yellow fever carrying mosquito to gain access to it from the shore (that is, 1,000 feet or more from the land), and craft coming alongside have been mosquito free. A vessel will be considered suspected if yellow fever carrying mosquitoes are found on board or if the provisions stated in (a), (b), and (c) above have not been complied with at the infected port. Upon arrival suspected vessels will be fumigated if yellow fever carrying mosquitoes are found on board or if fumigation at the infected port has not been done at a time and in a manner satisfactory to the

quarantine officer; nonimmune passengers and members of the crew who land may be detained in quarantine for the time necessary to complete a period of six days from the hour of leaving the infected port; the ship, crew and transiting passengers may be allowed to proceed under provisional pratique until the six-day incubation period has been completed. A vessel will be considered infected if yellow fever has occurred on board. Infected vessels, after removal of the sick, will be fumigated; all nonimmune persons on board may be detained in quarantine for a period of six days from the date of last possibility for infection, but members of the crew will preferably be held on board the vessel which may be allowed to proceed under provisional pratique until the six-day incubation period has been completed; persons on ships under such provisional pratique will be inspected by the quarantine officer not less than once daily.

REGULATION 116.4. Plague: A vessel arriving from a plague infected port may be considered free from infection if it has been adequately fumigated for the destruction of rodents in accordance with the provisions of Regulation 117.1, and if satisfactory anti-plague measures have been observed at the infected port. A vessel will be considered suspected if fumigation and anti-plague precautions, as indicated above, have not been carried out. If rat plague exists on board or if any human cases have occurred during the voyage the vessel will be considered infected. Infected vessels will be fumigated immediately after removal of the sick, and will then be completely discharged and again fumigated throughout; those ill with plague shall be held in quarantine until well, and all others on board may be detained for seven days. Persons coming from a plague infected port who are suffering from acute respiratory diseases, or who have died with respiratory symptoms during the voyage, will be examined with a view to detecting the presence of pneumonic plague. Pneumonic plague cases will be strictly isolated, and the contacts will be detained in quarantine seven days. Vessels which have accepted freight from badly infected districts may be refused permission to break cargo at the ports of the Panama Canal, or the ports of Panama or Colon, Republic of Panama.

REGULATION 116.5. Smallpox: A vessel arriving from a port in which smallpox prevails in epidemic form may be considered free from infection if all persons on board are protected from smallpox; it will be considered suspected if any persons are not so protected, and infected if smallpox exists on board. On suspected vessels nonimmune persons will be vaccinated and detained until a reaction appears. Infected vessels will be detained until the sick have been removed and their quarters and personal effects have been cleansed or sterilized; contacts