In what circumstances must obstacles to free moment caused by differing national law be acceptable?

What kind of national laws are capable of being MEGR?

Cassis De Djion (Cassis rule of reason) principal. provides justification beyond art 36.
import of Cassis to Germany.

Article 34 TFEU

Keck
supermarket selling at loss to increase its sale and capture shoppers

Article 30 TFEU

Mandatory requirement under Cassis de Djion

Article 151 TFEU

Article 153 of TFEU
H & S

Article 157 TFEU

Article 156 TFEU

Foster v British gas [1990]
Defines public body.

Van Gend en Loos v netherlands adminstratie der Blastingen

directive 2003/88
working time directive

Von Colson principal (principal of indirect effect)
two female social workers claim discrimination and seeking remedy form German Court.

Rattie
Unimplemented directive

Harmonisation

Subsidiarity

Direct effect/ directly effective

Directly applicable

Dual vigilance (EU context)

Commission v. UK: Re UHT Milk
protection of health.

Negative integration

Positive integration

Answering questions regarding art 34

Cassis mandatory requirement

Preliminary Reference