Opinion delivered pursuant to the second subparagraph of Article 228(1) of the EEC Treaty; Opinion 2/91 of 19 March 1993 (Convention No. 170 of the International Labour Organization Co - Common Market Law Review View Opinion delivered pursuant to the second subparagraph of Article 228(1) of the EEC Treaty; Opinion 2/91 of 19 March 1993 (Convention No. 170 of the International Labour Organization Co by - Common Market Law Review Opinion delivered pursuant to the second subparagraph of Article 228(1) of the EEC Treaty; Opinion 2/91 of 19 March 1993 (Convention No. 170 of the International Labour Organization Co 30 6 Common Market Law Review