Tribunicia potestas
From NovaRoma
The special power of the Tribuni Plebis which authorizes them to issue intercessio, to veto any act or proposal of any magistrate, including another Tribunus Plebis.
The special power of the Tribuni Plebis which authorizes them to issue intercessio, to veto any act or proposal of any magistrate, including another Tribunus Plebis.