Changes made by 91/268/EEC: Commission Decision of 26 April 1991 amending certain Commission Decisions concerning agricultural statistics in connection with the unification of Germany
EU Decision 1991/268
Made to 87/228/EEC: Commission Decision of 16 March 1987 amending Decision 77/144/EEC laying down the standard code and rules governing the transcription into a machine-readable form of the data of the surveys of plantations of certain species of fruit trees and laying down the boundaries of the production areas for these surveys
From legislation.gov.uk's record of changes, the official one: see it there.