European Union law is supreme over domestic legislation.
So European Union regulations and directives take precedence over domestic legislation.
But does this also mean the law contained within EU treaties (TEU, TFEU) is supreme over domestic legislation (eg. acts of parliament)?
In the Costa judgement this appears relevant:
It follows from all these observations that the law stemming from the treaty, an independent source of law, could not, because of its special and original nature, be overridden by domestic legal provisions, however framed, without being deprived of its character as community law and without the legal basis of the community itself being called into question
This implies EU treaty law is supreme?