Changes to 80/101/ECSC: Commission Decision of 20 December 1979 extending the authorization for the formation of the Groupement Européen du Manganèse by Société Nouvelle des Aciéries de Pompey, Compagnie Universelle d'Acétylène, Société Française d'Électro-Métallurgie and Sociedade Eurominas Electrometalurgia (Only the French text is authentic)
EU Decision 1980/101
No changes to 80/101/ECSC: Commission Decision of 20 December 1979 extending the authorization for the formation of the Groupement Européen du Manganèse by Société Nouvelle des Aciéries de Pompey, Compagnie Universelle d'Acétylène, Société Française d'Électro-Métallurgie and Sociedade Eurominas Electrometalurgia (Only the French text is authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.