ustavan

1. constitutional
   Ustavni sud je doneo odluku o tom zakonu. — The Constitutional Court has ruled on that law.
   Pokrenuta je rasprava o ustavnim promenama. — A debate on constitutional changes has started.
2. constitutional; in line with the constitution
   Opozicija tvrdi da novi zakon nije ustavan. — The opposition claims the new law is not constitutional.

In the sense 'relating to the constitution' the form ustavni is usually used (Ustavni sud).