Originally Posted by
gglave
Unlike in Europe, customs and immigration are handled by one person, so there's no "red line" / "green line."
The immigration officer will stamp your card which you then present to the customs officer after collecting your bags before exiting.
Depending on how you answered at immigration you
may have a special 'secret' stamp in which case you'll be pulled aside and examined at the customs station.
Agreed, unlike Europe the choice is not yours.