A treaty breach does not automatically suspend or terminate treaty relations, however. It depends on how the other parties regard the breach and how they resolve to respond to it. Sometimes treaties will provide for the seriousness of a breach to be determined by a tribunal or other independent arbiter. An advantage of such an arbiter is that it prevents a party from prematurely and perhaps wrongfully suspending or terminating its own obligations due to another's alleged material breach.
Using what to determine the seriousness of a breach can prevent a party from prematurely suspending its obligations due to another party's alleged material breach?
a tribunal or other independent arbiter