discretionary
adjectiveUK /dɪˈskreʃənəri/
US /dɪˈskreʃəneri/
You can choose whether to do it or not.
The teacher gave us discretionary time to read any book we like.
OTHER MEANINGS
2. Left to a person's own judgment or choice.
Bonuses are discretionary and depend on performance.
3. Available to be used as needed, not set aside for a fixed purpose.
The company has discretionary funds for special projects.
4. Not required by law or rule.
Parking fees are discretionary at this lot.