The government has treated drug offences very strictly, allowing for even low-level involvement and possession to lead to lengthy prison sentences as a means of deterrent.
The law of supplying a drug, or intending to supply a drug can be very strict. Liability can arise even where there has been no money exchanged.
Drug Importation is a multibillion dollar industry attracting very serious punishments. Due to the international nature of offences, this can often be a complex area of law with cases lasting a long time.