The facts
5 The primary judge set out an account of the facts that was not subjected to any criticism before us and which, consequently, I adopt. It was as follows:
"Applicant's Background
The applicant was born on 1 March 1959 in the Punjab, India. He lived with his family at Amritsae [sic: scilicet Amritsar], a short distance from the Pakistan border.
After completing his schooling the applicant obtained an electrician's diploma. He assisted his father on his farm and held various other forms of employment in the Punjab.
The applicant's father was an active supporter of the Sikh separatist movement. This sometimes placed him and his family into conflict with the Indian authorities. In about 1983 or 1984 the applicant's brother disappeared. It later transpired that he had been killed, probably murdered. The applicant spent a great deal of time investigating his brother's disappearance. During this period he became the target of threats and harassment by local police and from other sources, apparently because of the inquiries he was making about his brother. The harassment became so serious that in 1985 the applicant left the Punjab and went to Delhi. In 1987 he flew to New Zealand where he remained for about six months. Finally, on 15 May 1988, he came to Australia from New Zealand. He found employment almost immediately and remained in work until 1994 when his employment was terminated after he suffered a back injury at work.
In 1979 the applicant had married Harjeet Kaur in India. They had two sons, Jagmohan born in 1981 and Manpreet born in 1984. The applicant and his wife were separated in 1985 when he left the Punjab, and they were later divorced. In the meantime, from 1985 until they came to Australia, the two boys lived with the applicant's parents in Amritsae [sic]. In about 1990 the applicant met Penelope Austin, an Australian citizen who was a nurse at the Royal North Shore Hospital. They were married on 20 October 1990.
On 12 December 1994 the applicant received a permanent resident visa. Since then he has returned to India on two occasions. The first was between January and March 1995, and the second between December 1995 and April 1996. The purpose of both trips was to arrange for his sons to come and live in Australia. On both occasions he remained in Delhi. He was not prepared to return to the Punjab, which he continued to regard as too dangerous for him.
In about 1990 the applicant met a man called D Singh (no relation) who also came from Amritsae [sic]. Not long afterwards D Singh returned to India. He and the applicant remained in touch, although the applicant said they were not close friends. The applicant described the course of their acquaintanceship in a statement that was later made available to the Minister. He described meeting Mr Singh in India in 1996. Mr Singh told him that he would assist in obtaining Australian visas for the applicant's sons. At Mr Singh's insistence they played cards together one night. The applicant got drunk during this game and had to be taken home by his nephew. Some time later the applicant's father told him that he understood Mr Singh to be a criminal. The next time the applicant saw Mr Singh was in Australia. The applicant told him that he wanted nothing further to do with him. Mr Singh responded that the applicant owed him a great deal of money as a result of their card game. The applicant quoted Mr Singh as saying, 'If you think wisely and help me to set up my business here in Sydney then I will not pursue you for the money you owe me, otherwise it may result in your sons being harmed. I do not need to remind you about your friends Master and Kashmir. Just keep in mind what happened to them or that will happen to your sons'. Mr Singh's reference to 'Master' and 'Kashmir' referred to Master Singh and Kashmir Singh who had both been shot dead in an execution-style murder near the applicant's home in the Punjab.
The applicant's children at that time were still in India and the applicant took Mr Singh's threats seriously. Not long afterwards, he did as Mr Singh demanded and started to sell heroin on his behalf. It appears from the police records that he did so for a relatively short time only: the charges which were in due course laid against him relate to offences which took place between 5 and 17 September 1996. The applicant's principal contact in these drug transactions was a man known to him as 'Jerry'. As it transpired, Jerry was an undercover police officer. He was fitted with a recording device and most of his conversations with the applicant were recorded.
On 17 September 1996, the applicant and a co-offender supplied Jerry with 112 grams of heroin. They were arrested immediately afterwards and charged with supplying heroin. In his subsequent statement the applicant described it as 'almost a relief' to be caught. When questioned by police he freely admitted his involvement in the drug transactions. He gave a full account of his dealings with D Singh. He said that he had been coerced into his drug dealings by Mr Singh's threats to his children. His co-offender, who was separately interviewed, gave an account which was entirely consistent with that of the applicant.
The applicant was taken into custody on 17 September 1996 and bail was refused. On 22 May 1998 he pleaded guilty on indictment to four counts of supplying a prohibited drug, namely heroin. On 22 December 1998 he and his co-offender were convicted and sentenced by Judge Wall of the Sydney District Court. In relation to the first two counts in the indictment the applicant and his co-offender were both sentenced to minimum terms of imprisonment of two years and six months commencing from 17 September 1996 and expiring on 16 March 1996. An additional term of 10 months was specified in each case, to expire on 16 January 2000. The third and fourth counts related to the applicant only. In relation to each of them he was sentenced to a fixed term of three months imprisonment to commence at the expiration of the minimum term specified under the first two counts. The minimum term after which the applicant was eligible to be released to parole was specified to expire on 16 June 1999.
Judge Wall gave lengthy observations on sentence. He set out the details of the offences, as to which there was no dispute between the parties. His Honour's findings in relation to these offences were as follows:
'What I have related in relation to the objective circumstances indicates a serious degree of criminality on the part of both offenders in relation to the supply of heroin. Also in the case of Karm Singh, by reason of the fact he was involved at an earlier point of time and indeed is guilty of four counts of supply in contrast to the prisoner Inder Kalsi who is guilty in relation to two counts of supply.
….
It is apparent from the evidence before me that both prisoners were involved as go-betweens for a principal in the supply of heroin and in relation to the offences charged in counts 1 and 2 both were actively involved in a significant supply of heroin. Moreover, it is apparent from the negotiations that took place with the undercover operator that but for the intervention of police the prisoners may well have been the conduits for supplying heroin into the community in significant amounts from a principal.'
A little later, his Honour made the following comment in relation to the offences:
'It is proper to say that the two prisoners became involved in the supply of heroin in a very short closed period of time. All offences were committed in the month of September 1996, and in the case of the prisoner Kalsi his involvement extended only from 16 September to the following day, 17 September. It is also proper to remark on the comment made by the police officers that the investigating police were of the view that the behaviour of the two prisoners indicated that they were amateurs rather than professionals. The police accepted that they were acting on behalf of a principal supplier rather than being principals themselves.'
His Honour recited the details of the applicant's background including his employment history and the fact that he had no prior criminal convictions in India or Australia. His Honour referred to the 'many, many references' tendered in evidence from members of the Sikh community which testified to the applicant's good character and reputation prior to the commission of these offences. His Honour concluded that on the evidence before him, the applicant had led an 'exemplary lifestyle' until committing the offences.
Judge Wall discussed the applicant's and his co-offender's claim that they had been coerced into selling heroin by the making of threats against family members. His Honour noted that sentencing courts generally adopt a certain degree of scepticism in relation to such claims. However in this case his Honour was satisfied of the genuineness of the claims made by the applicant and his co-accused. As his Honour said:
'After considering all the evidence, I am satisfied that the complicity of both prisoners in relation to the commission of those crimes was not motivated solely by greed but there was a measure of coercion involved which led to the commission of these crimes.'
His Honour indicated that a reduction in sentence would be effected by reason of this consideration.
His Honour also discussed, in circumspect terms, the evidence that the applicant and his co-offender had assisted the police in providing information about the principal offender for whom they had been selling drugs. Under s 442B of the Crimes Act 1900 (NSW), a court may take into account, in reduction of sentence, that a person has assisted the law enforcement authorities. In this case, his Honour was satisfied that information had been given to the police which they accepted as 'truthful and reliable'. He was also satisfied that:
'... by reason of the claim under s442B that the prisoners have experienced a real fear of harm to themselves and that that fear was held by them whilst they were in custody, particularly in the early weeks of custody when certain visitations to the Prison Detention Centre took place.'
Towards the end of his sentencing observations, his Honour recorded the following findings:
'I am satisfied that but for the circumstances of Karm Singh becoming indebted in a gambling matter to the third party and thereafter receiving certain threats he would not have become involved in the supply of heroin. I am also satisfied that but for Inder Singh Kalsi as a friend of Karm Singh becoming aware of the involvement of his friend Karm Singh in the supply of heroin in the background of coercion, he himself would not have become involved in the supply of heroin.
I am satisfied that their prospects of rehabilitation on their release from prison can be described as very good. In my view, the sentence should not be weighted towards special deterrence, rather the sentence should be weighted towards general deterrence.'
Finally, immediately before passing sentence, his Honour made the following observation:
'Whilst a measure of sympathy can be extended to both prisoners in the background of the coercion that led them to commit this crime, nonetheless they did willingly, knowingly, take part as a conduit for a significant supply of heroin and in the background of negotiating significant supplies of heroin. Accordingly, in my view, the sentence must be weighted toward general deterrence …'
As has been indicated, the applicant, upon his arrest, gave full details of D Singh's involvement in these offences. A person of Indian extraction had been observed by police near the area where the applicant and his co-offender were arrested. The police believed that this person might well have been the principal supplier. Not long afterwards the police went to Mr Singh's home to arrest him. However he was not there. As it transpires, he had already fled Australia and returned to India. Some time later, according to the applicant, he received a visit in prison from an acquaintance of D Singh who told him that Mr Singh knew that he had informed the police of his activities. Mr Singh said that he would kill the applicant and his family if he ever returned to India.
In October 1996 the applicant's oldest son, Jagmohan (Jack) arrived in Australia. The applicant's younger son, Manpreet (Manny) arrived a few months later, in February 1997. The applicant was in custody at this time and the boys went to live with the applicant's wife, Penelope Austin. On all accounts they have become extremely attached to her and she to them. They call her 'Mum'. On 21 April 1999 Jagmohan became an Australian citizen. Manpreet intends to seek citizenship as soon as he is old enough to do so.
On 23 February 1999 a representative of the Department of Immigration and Multicultural Affairs ('the Department') wrote to the applicant, who was then in prison, informing him that he may be liable for deportation from Australia by reason of his convictions for supplying a prohibited drug. He was invited to provide material to demonstrate why he should not be deported and was told that he would be interviewed before a deportation decision was made.
This interview took place on 10 March 1999. Its results are set out in a standard-form document which contains questions to be asked of an offender and allows space for the interviewer to insert the answers. In the space for 'Offender's report of current offence (Why was it committed?)' the response recorded is 'supply heroin, there was a threat to my children in India if I did not supply the drug they would be killed'. To the question whether he would offend again the response is recorded: 'No - if I had had my children here it wouldn't have happened. I have a very bad name in the community. If I didn't have to do it I wouldn't have.' To the question how he regarded his criminal history the answer is recorded: 'Very highly ashamed. Seen badly by the community'. The applicant told the interviewer that he had good prospects of rehabilitation. He was learning welding in prison and had job offers upon his release. He said that his wife, his children and the community would help him. When asked about any particular difficulties as a result of deportation, the response is noted: 'I'll be killed if I return to India. I have been threatened by the brother of the man that threatened me to supply the drugs that if I return I will be killed.'
On 9 April 1999 the applicant's wife, Penelope Austin was also interviewed. She affirmed the closeness of her relationship with the applicant. When asked her attitude towards the applicant's deportation she said, 'This is the worst thing that I've ever had to deal with. I've been to India and could not survive there. It would be very upsetting and disruptive if he was deported.' When asked whether she would accompany the applicant if deported she said, 'I don't know what I would do. I probably would go with him but it would affect our whole life. I'd have to leave a very stable job. If Karm's kids could stay here I may remain here with them until they are old enough to look after themselves.'
The other person to be interviewed by a departmental officer was a friend of the applicant, Jagdish Raj. Mr Raj described himself as a 'close friend' of the applicant having known him for more than 20 years. Mr Raj said that the applicant was a hard worker, and that he could offer him employment on his release from prison. More importantly, Mr Raj gave the following information:
'The first week of January 1999, the person who forced Mr Karm Singh to do the illegal activities, rang me up at work and told me he knew I (myself) had given evidence against them in Mr Karm Singh's case. He told me to give Karm Singh and Inder Singh Kalsi a message that when they come to India from Australia they will be killed. And as to me he said that he'll see to me when I go back to India.'
6 The primary judge went on to recount that submissions were invited by the Department of Immigration and Multicultural Affairs and the responses to these invitations by Mr Singh's solicitor. As there is no claim of denial of procedural fairness, I need not summarise this material.
7 On 17 August 1999, the Minister for Immigration and Multicultural Affairs, the Honourable Philip Ruddock, considered a minute concerning Mr Singh that had been prepared by a departmental officer, Ms Karen Van Raak. The purpose of the minute was stated to be:
"To seek your decision on: