Changes to 93/257/EEC: Commission Decision of 15 April 1993 laying down the reference methods and the list of national reference laboratories for detecting residues
EU Decision 1993/257
The legislation that changes 93/257/EEC: Commission Decision of 15 April 1993 laying down the reference methods and the list of national reference laboratories for detecting residues, newest first. Choose one to see each change.
From legislation.gov.uk's record of changes, the official one: see it there.