Richard De George separates two questions students usually collapse: when is going outside the chain of command permitted, and when does it become required? Load a case, satisfy the conditions one at a time, then decide what you will actually do — and see what it cost the people who did it.
1 · Load a case
2 · De George’s conditions — tick what is true
3 · Try a rival theory
4 · How many times have you raised it and been overruled?