It is probably safe to assume that as CEO, the travel approval rule is one that he/she feels is important. I could speculate that travel time is unproductive, or that under 7 days might indicate a sudden decision that could have been thought through more thoroughly. The point is, this CEO wants details on these specific instances. I would grant the benefit of doubt, and believe the reasons are probably worthwhile to this CEO, and the same could apply to anyone in a managerial position, that wants to take out the trash every day.