34 THE SOCIETY FOR THE PRESERVATION OP 



shall be duly proved that the possession of the tusks 

 weighing less than 5 kilogrammes was anterior to 

 the date of the coming into force of the present 

 Convention. No such proof shall be accepted a 

 year after that date. 



12. Application of measures, such as the super- 

 vision of sick cattle, etc., for preventing the trans- 

 mission of contagious diseases from domestic ani- 

 mals to wild animals. 



13. Application of measures for effecting the 

 sufficient reduction of the numbers of the animals 

 of the species mentioned in Schedule V. attached to 

 the present Convention. 



14. Application of measures for insuring the 

 protection of the eggs of ostriches. 



15. Destruction of the eggs of crocodiles, of 

 those of poisonous snakes, and of those of pythons. 



ARTICLE III. 



The Contracting Parties undertake to promul- 

 gate, within a year from the date on which the pre- 

 sent Convention comes into force, unless they already 

 exist, provisions applying in their respective posses- 

 sions within the zone defined in Article I. the prin- 

 ciples and measures laid down in Article II., and to 

 communicate to one another, as soon as possible 

 after issue, the text of such provisions, and, within 

 eighteen months, information as to the areas which 

 may be established as reserves. 



It is, however, understood that the principles 

 laid down in paragraphs 1, 2, 3, 5 and 9 of 

 Article II. may be relaxed, either in order to permit 



