Opinion of Mr Advocate General Lenz delivered on 10 June 1987

1 Translated from the German.

2 Entered in the Register of the Court of Justice on 12 February 1986.

3 Judgment of 5 July 1983 in Case 171/82 Biagio Valentini v Assedic, Lyon [1983] ECR 2157, paragraph 13 at p. 2170.

4 Judgment of 15 October 1980 in Case 4/80 Remo d'Amico v Office national des pensions pour travailleurs salariés [1980] ECR 2951, at p. 2954.

5 Judgment of 5 May 1983 in Case 238/81 Raad van Arbeid v Van der Bunt-Craig [1983] ECR 1385, at p. 1397 et seq.

6 Judgment of 2 July 1981 in Joined Cases 116, 117, 119 to 121/80 Rijksdienst voor Werknemerspensioenen v Celestre and Others [1981] ECR 1737, at p. 1753.

7 See paragraph 9 of the decision in Joined Cases 116, 117, 119 to 121/80, cited above.

8 Judgment in Joined Cases 116, 117, 119 to 121/80, Celesire, paragraph 12.

9 Judgment of 14 March 1978 in Case 98/77 Schaap v Bestuur van de Bedrijfsvereniging voor Bank- en Verzekeringswezen, Groothandel en Vrije Beroepen [1978] ECR 707, at p. 713.

10 Judgment of 5 April 1979 in Case 176/78 Schaap v Bestuur van de Bedrijfsvereniging voor Bank- en Verzekeringswezen, Groothandel en Vrije Beroepen [1979] ECR 1673, paragraph 10 at p. 1685.