Reference for a preliminary ruling by the Sø- og Handelsret by order of that court of 20 February 1996 in the cases of Handels- og Kontorfunktionærernes Forbund i Danmark (HK), acting on behalf of Berit Høj Pedersen, v. the Fællesforening for Danmarks Brugsforeninger (FDB), acting on behalf of Kvickly Skive; HK, acting on behalf of Bettina Andresen, v. Dansk Tandlægeforening, acting on behalf of Jørgen Bagner, a dental practitioner; HK, acting on behalf of Tina Pedersen, v. Dansk Tandlægeforening, acting on behalf of Jørgen Rasmussen, a dental practitioner; and Kristelig Funktionær-Organisation, acting on behalf of Pia Sørensen v. Dansk Handel & Service, acting on behalf of Hvitfeldt Guld og Sølv ApS. (Case C-66/96)