"The authorities show that those who evade significant amounts of duty by such conduct, should expect to go to prison. The term of imprisonment will obviously be affected by a number of factors, including the amount of duty evaded. Aggravating features which are likely to increase the sentence include playing an organisational role in the importation; making importations repeatedly over a period of time; continuing to make importations despite a warning from the customs and excise authorities, and importing more than one type of dutiable goods, for example, alcohol and tobacco.