A customs post signifies you are ready to make the transition from one state of consciousness to another. This is especially true if you are asked questions by an official at the customs post. If the country or state you are moving into is bigger than the one you are leaving, your new state of consciousness is expanded. If it is smaller you are doing something that is limiting you.
It is common for the official to ask what you will work at in the new location. They may even suggest a career and a salary. If they do, the career and salary are symbolic of what you are being asked to do in order to develop your new state of consciousness.