These Regulations reflect the provisions of Annex XIA to Regulation (EC) No. 999/2001 of the European Parliament and of the Council laying down rules for the prevention, control and eradication of certain transmissible spongiform encephalopathies. That Annex imposes transitional measures with regard to the removal of specified risk material and was inserted into Regulation (EC) No. 999/2001 by Article 3 of Commission Regulation (EC) No. 1326/2001. The substantive amendments made by these Regulations to the principal Regulations are as follows: (a) in the light of the transitional measures referred to above: (i) regulation 3 is amended to exclude from the scope of the definition material derived from sheep and goats born, continuously reared and slaughtered in certain third countries (ii); regulation 4 is substantially revised so that, in particular, material derived from bovine animals born, continuously reared and slaughtered in certain third countries is now outside the scope of the definition (reg. 2(6) to (8)), (iii) regulation 8 is replaced with a provision prohibiting the use of bovine, ovine and caprine bones in the production of mechanically recovered meat (reg. 2(10)) and regulation 9 (registration of premises on which meat is recovered by mechanical means from ruminant animals) is revoked (reg. 2(11)), and (iv) a new regulation, 15A, dealing with the treatment of imported carcases containing vertebral column which is specified bovine material, is inserted into the principal Regulations (reg. 2(12)).