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Published online by Cambridge University Press: 18 November 2009
Upon unanimous recommendation by the International Commission on Zoological Nomenclature, the International Zoological Congress which met at Budapest, Hungary, September 4th to 9th, 1927, adopted a very important amendment to article 25 (Law of Priority) which makes this article, as amended, read as follows (italicized type represents the amendment roman type represents the old wording):—