Changes made by 90/510/EEC: First Council Decision of 9 October 1990 on the extension of the legal protection of topographies of semiconductor products to persons from certain countries and territories
EU Decision 1990/510
No changes made by 90/510/EEC: First Council Decision of 9 October 1990 on the extension of the legal protection of topographies of semiconductor products to persons from certain countries and territories are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.