If a crime carries a mandatory punishment, that punishment is fixed by law for all cases, in contrast to crimes for which the judge or magistrate has to decide the punishment for each particular case.
2. a territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they ar able to stand by themselves
Adjective
1. required by rule;
"in most schools physical education are compulsory""attendance is mandatory""required reading"