怎么理解这个豁免？

最新的这个豁免，怎么理解呢？
28，hexavalentchromium in corrosion preventive coatings of unpainted metal sheetings and fasteners used for corrosion protection and electromagnetic interference shielding in equipment falling under category three of directive 2002/96/ec(IT and telecommunications equitment),exemption granted until 1 july,2007
谢谢了。