Answer:
The answer is: DEPENDS, more information is needed
Step-by-step explanation:
More information is needed about the refunding or rescheduling policies of the company that rented the hunting lodge in order to make a decision on this case.
If there was no possibility of refunding of rescheduling, then Jack probably made the right decision. The company had already paid for the trip and the client cancelled the trip, not Jack. Jack probably needs to inform the board about his actions, but I find them not only correct but also logical.
But if the company could have rescheduled the trip or get their money back, then Jack acted improperly. He is not the company, not even Steve Jobs could decide freely over Apple. What he did was wrong and his power to make decisions should be revised and control systems should be established.