Wiktionary
nondiscretionary
a. 1 Not discretionary; thus, frequently, mandatory 2 (context business English) Of or pertaining to non-discretionary spending
WordNet
Usage examples of "nondiscretionary".
They hadn't quite made it a nondiscretionary order, but they had specifically denied her the right to take any 'cat other than Nimitz with her aboard the military transport whose use her orders to Grayson authorized.