[4] On 30 November 1998 Mr Matasaru pleaded guilty to 10 counts of having supplied heroin to others, one count of possession of heroin in a quantity exceeding 200g, one count of possessing a set of scales used in connection with unlawfully supplying a dangerous drug, one count of receiving a quantity of sewing machines knowing it to have been obtained from trafficking a dangerous drug, and one count of defrauding a Commonwealth department. On that date he pleaded not guilty to a charge of carrying on the business of unlawfully trafficking in the dangerous drug heroin, allegedly occurring between 5 August 1994 and 6 September 1997. On 23 July 1999 the indictment presented against him was amended, and on that day he pleaded guilty to a count of having carried on the business of unlawfully trafficking in heroin between 3 March 1997 and 6 September 1997, and repeated his plea of guilty to having had possession of the dangerous drug heroin (on 5 September 1997); but the amended allegation thus admitted was that the quantity of the drug exceeded two grams; and he repeated his plea of guilty to having defrauded a department of the Commonwealth, that offence being admitted to have occurred between 3 March 1997 and 9 September 1997.