The case of Von Colson established which principle of European law?
1 That the principle of indirect effect can apply to legislation that was passed before the EU made a rule in the area covered by the existing national rule
2 That it is for the national court to determine the extent to which it may interpret national law in conformity with the wording and purpose of a directive
3 That directives are capable of having indirect effect in that their provisions can be used by national courts in interpreting the meaning and scope of national legislation, in particular to national legislation passed specifically to implement a directive
4 That in interpreting national law in the light of the provisions of EU law the courts must not distort the meaning of the domestic legislation
Answer 3 - directives can have indirect effect