Changes to 91/592/EEC: Commission Decision of 5 November 1991 amending Commission Decision 89/599/EEC approving derogations provided for by Greece, Italy and Portugal from certain provisions of Council Directive 77/93/EEC in respect of seed potatoes originating in Canada (Only the Greek, Italian and Portuguese texts are authentic)
EU Decision 1991/592
No changes to 91/592/EEC: Commission Decision of 5 November 1991 amending Commission Decision 89/599/EEC approving derogations provided for by Greece, Italy and Portugal from certain provisions of Council Directive 77/93/EEC in respect of seed potatoes originating in Canada (Only the Greek, Italian and Portuguese texts are authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.