Passenger customs declaration controls channel choice and triggers duty assessment, baggage examination, and penal exposure for misdeclaration. Arriving passengers must complete a Customs Baggage Declaration Form and choose the Green Channel if they have nothing to declare or goods within duty-free allowance, or the Red Channel if they have goods to declare or exceed allowances; officers verify declarations, scrutinize travel documents, assess and collect duty, and release baggage on payment. Misdeclaration, carriage of prohibited items, or commercial-quantity imports expose passengers to seizure, confiscation and penal action, with repeat offenders facing higher fines and possible prosecution.