Robuta

https://www.vedantu.com/question-answer/if-x-is-a-nonmetal-its-oxide-x2o3-is-expected-to-class-11-chemistry-cbse-60dcb1c7e201226dfe5e71ca
If X is a nonmetal its Oxide X2O3 is expected to be a oxide
xnonmetal
https://www.dol.gov/newsroom/releases/msha/msha20170522
final ruleeffective datemshaannouncesextension