Changes made by 73/153/EEC: Commission Decision of 23 May 1973 authorizing the Member States to allow the marketing of reproductive material of certain forest species subjected to reduced requirements
EU Decision 1973/153
No changes made by 73/153/EEC: Commission Decision of 23 May 1973 authorizing the Member States to allow the marketing of reproductive material of certain forest species subjected to reduced requirements are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.