Answer:
1279.
it lasted from 960-1279 ;)
The principle that the federal courts can "check" on the other branches is called "judicial review" - I think that this is what should be filled into the gap!
It means that the court can check the others' work. For example, it can declare some passed laws or executive orders unconstitutional.
A law on the War Of Drugs, passed by Congress.
I hope this helps!
