Changes made by 89/599/EEC: Commission Decision of 9 November 1989 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 1989/599
No changes made by 89/599/EEC: Commission Decision of 9 November 1989 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.