Thanks for your reply, chevvron.
To make it a bit more complicated however, I will take the example of the LOWS CTR/TMA, both of which are the same class of airspace (D).
CTR: Surface - 7.000ft AMSL, class D
Controlling unit: Salzburg Tower
TMA: 1.000ft AGL - 3.500ft AMSL, class E
3.500ft AMSL - FL195, class D
Controlling unit: Salzburg Radar (Approach)
Whose airspace is the slice between 3.500ft and 7.000ft ?