The Epizootic Diseases Ordinance (EzDO) of 27 June 1995 is the legal framework for the testing of bovine species. Since the revision of the Epizootic Diseases Ordinance (EzDO) in 2013 the minimal age for bovine animals be tested for changes in the prion protein is 48 months. The tests for changes in the prion protein have to done if bovine animals are fallen stock or have not been killed for the purpose of slaughter or have been taken for slaughter because of disease or injury. In the older version of the Epizootic Diseases Ordinance (EzDO) the minimal age of bovine animals be tested for changes in the prion protein was defined with the penetration of the permanent incisors. The existence of four permanent incisors was the given minimal age for bovine animals be tested for changes in the prion protein. As this definition of a minimal age used in the older version of the Epizootic Diseases Ordinance (EzDO) was not very precise in terms of months due to biological variation, in the Technical Directives two different figures for the minimal age have been used. In the Technical Directives on the Sampling of animals slaughtered because of disease to test for BSE of 15 April 2014 the minimal age is 24 months and in the Technical Directives on the Ante-mortem inspection of animals dated 24 May 2006 the minimal age is 30 months. This is the reason why in meetings and presentations during your visit two different minimal ages in months have been given. It has to be considered that the Epizootic Diseases Ordinance (EzDO) overrides Technical Directives. So as a consequence the minimal age for bovine animals be tested for changes in the prion protein is 48 months since the revision of that ordinance in 2013. The Technical Directives will be part of an upcoming revision so that differences to the Epizootic Diseases Ordinance (EzDO) will be abolished.