443 



able and practicable, to apply the requirements of the Con- 

 vention to such ships also, having regard to their size, service 

 and the type of fuel used for their propulsion; 



(6) ships for the time being engaged in the whaling industry when 

 actually employed on whaling operations; 



(c) ships for the time being navigating the Great Lakes of North 

 America and their connecting and tributary waters as far east 

 as the lower exit of St. Lambert Lock at Montreal in the 

 Province of Quebec, Canada; 



{d) naval ships and ships for the time being used as naval 

 auxiliaries. 



(2) Each Contracting Government undertakes to adopt appropriate 

 measures ensuring that requirements equivalent to those of the 

 present Convention are, so far as is reasonable and practicable, 

 applied to the ships referred to in subparagraph id) of paragraph (1) 

 of this Article. 



3. The existing text of Article III of the Convention is replaced by 

 the following : 



Article III 



Subject to the provisions of Articles IV and V: 



(a) the discharge from a tanker to which the present Convention 

 applies, within any of the prohibited zones referred to in 

 Annex A to the Convention, of oil or oUy mixture shall be 

 prohibited; 



(6) the discharge from a ship to which the present Convention 

 applies, other than a tanker, of oil or oily mixture shall be 

 made as far as practicable from land. As from a date three 

 years after that on which the Convention comes into force 

 for the relevant territory in respect of the ship in accordance 

 with paragraph (1) of Article II, sub-paragraph {a) of this 

 Article shall apply to a ship other than a tanker, except that 

 the discharge of oil or of oily mixture from such a ship shall 

 not be prohibited when the ship is proceeding to a port not 

 provided with such facilities for ships other than tankers as 

 are referred to in Article VIII; 



(c) the discharge from a ship of 20,000 tons gross tonnage or 

 more, to which the present Convention applies and for which 

 the building contract is placed on or after the date on which 

 this provision comes into force, of oil or oily mixture shall be 



