34 The Memorandum identifies the intent of the sub-section as being to lift the bar to payment of a pension to a person confined in a psychiatric institution "after" being charged with an offence who was undertaking a course of rehabilitation. The Memorandum is not consistent with his Honour's identification of the legislative intent of the sub-section as being to draw the distinction he refers to in par [42] of his reasons. Nor is it consistent with a legislative intention that the bar to a pension in s 1158(1)(a)(ii) - and in (1)(a)(i) also - is not to be capable of being rendered inoperative merely by the person undergoing a course of rehabilitation, as his Honour stated in par [55] of his reasons.
35 The Memorandum does not use the language of s 135THA(2)(b)(ii) and (4)(b)(ii), provisions which refer to persons confined in a psychiatric institution "in consequence of" having been charged with the commission of an offence. Instead, the Memorandum says that the new sub-s (9) would modify the effect of the bar on payment of a pension to a person confined in a psychiatric institution "after being charged with an offence". The Memorandum appears to be stating concisely but with precision the effect of this sub-section on both persons charged, convicted and, at any time thereafter, moved from prison to psychiatric confinement and on persons charged, never convicted, but held in psychiatric confinement: both classes of person were relieved from the bars against pension entitlement in s 135THA(2)(b) and (4)(b) while undertaking a course of rehabilitation. The Memorandum confirms that the ordinary meaning of the words in s 135THA(9) which is set out above is the intended meaning. The legislative intent of sub-s (9) was to place both persons imprisoned and persons charged and psychiatrically confined without conviction on the same footing, but not, as the learned primary judge indicated, by barring both categories of person from a pension: the legislative intent was to the opposite effect in that it relieved both categories of person from that bar during the period such a person was confined in a psychiatric institution and was undertaking a course of rehabilitation.
36 The learned primary judge said that the intention of the Social Security Act 1991 was to restate the 1947 Act in plain English. This may be so as a general rule. But, by the 1991 Act, the Legislature changed direction so far as is presently relevant. From 1986 to 1991, the Legislature, by s 135THA as amended in 1986, treated persons convicted and imprisoned and persons charged, not convicted but psychiatrically confined on the same basis: neither class was entitled to a social security benefit unless they were both in psychiatric confinement and undergoing a course of rehabilitation. By s 1158 of the 1991 Act, however, the Legislature abandoned the bar against persons charged, not convicted but psychiatrically confined being paid social security benefits; instead, by s 1158(a), the Legislature imposed the bar only on persons "in gaol or undergoing psychiatric confinement because of a criminal conviction". However, by s 4 of and Schedule 2 to the Social Security (Rewrite) Amendment Act 1991 ("the Rewrite Act 1991"), s 1158 was amended to revert to a modified version of the position applying from 1986 to 1991: by this amendment, the bar against entitlement was once again extended to persons charged, not convicted but psychiatrically detained in consequence of having been charged. This to-ing and fro-ing was apparently regarded as involving a "minor technical refinement to the Principal Act [ie, the Social Security Act 1991] to make sure that it correctly reflects current social security legislation and policy": see cl 4 of the Explanatory Memorandum to the Rewrite Act 1991.
37 Whatever the general intent of the Social Security Act 1991, s 23(9) of the current Act has a significantly different operation from its precursor, s 135THA(9) of the 1947 Act. Section 135THA(9) lifted all the bars imposed by that section against pension entitlement on both persons convicted and imprisoned and on persons not convicted, but held in psychiatric detention, while such persons were undertaking a course of rehabilitation in psychiatric confinement. Section 23(9) of the current Act, however, only lifts the bar on pension entitlement imposed by s 1158(1)(a)(ii) (and now s 1158(b)) on persons undergoing criminal psychiatric confinement: unlike s 135THA(9), which in express terms affected the operation of the whole of s 135THA, s 23(9) can only affect the operation of s 1158(b), which alone refers to "psychiatric confinement". The extrinsic parliamentary material does not identify the reason for this change made by the Rewrite Act 1991 to the position established in 1986.
38 The learned primary judge found support for his construction of ss 1158(1)(a)(ii) and 23(9) in Blunn v Bulsey (1994) 53 FCR 572, a decision on the Social Security Act 1991 in the form it relevantly took from 1991 to 1999. Einfeld J there held that a prisoner who became mentally ill while serving his sentence and who was removed from prison to a hospital was not detained "in connection with" his conviction within the meaning of that phrase in s 23(5) as applicable to s 1160 as then in force. He was not therefore "in gaol" within s 1160(a) and s 23(5) and so was not barred from a social security "benefit". His Honour's ruling would have the same application to the bar in s 1158(1)(a)(i), as then in force, against the payment of a social security "pension" to a person in gaol. It is true, as the learned primary judge observed, that Einfeld J considered that the critical question was: "Why was the person detained at the psychiatric hospital?". But he asked that question solely to determine whether there was a sufficient nexus between the hospital detention and the person's conviction to enable the one to be said to be "in connection with" the other within the meaning of that phrase in s 23(5) as applied to s 1160(a) (and to s 1158(1)(a)(i)) as then in force. That Einfeld J asked this question in this particular context does not show that it is appropriate to ask the same question in order to determine whether the bar against payment of a pension to a person "undergoing psychiatric confinement because the person has been charged with committing an offence" in s 1158(1)(a)(ii) is lifted where that person is undertaking a course of rehabilitation. Section 23(9) had no application to persons within s 1160(a) or s 1158(1)(a)(i), ie, to persons in gaol, and Einfeld J did not have to consider its interaction with s 1160(b) or s 1158(1)(a)(ii) upon persons in psychiatric confinement.
39 The decision in Blunn v Bulsey does, however, highlight the significant change effected by the 1991 Act: under s 135THA, the position of both convicts and non-convicted psychiatric detainees was identical. Only if a person in either class was both in psychiatric confinement and undertaking a course of rehabilitation was the person entitled to a social security benefit. Einfeld J's decision, if correct, shows that the 1991 Act improved the position of convicts by lifting the bars in ss 1158, 1160, 1162 and 1162A on the payment of various kinds of social security benefit to persons in gaol once they were transferred to a psychiatric institution for reasons unconnected with their original conviction and imprisonment: such persons did not also have to be undergoing a course of rehabilitation to become entitled to a social security payment. A person charged but, instead of being convicted, held in psychiatric confinement, continued, however, to be barred from access to social security benefits unless he was also undertaking a course of rehabilitation while in such confinement.
40 The learned primary judge also referred to the decision of Gray J in Garden v Secretary, Department of Family and Community Services (2001) 33 AAR 280. Gray J considered s 23(5) had a different operation from that identified in Blunn v Bulsey, holding that: "the legislative intention [in s 23(5)(a) and (b)] is to cover the entire field of detention resulting from a conviction" (at 287). There, a person had been convicted of murder and an order made under the relevant State legislation that he be admitted to and detained in a psychiatric in-patient service for a long period. After a time, he was moved from the psychiatric institution in which he was initially detained to several prisons and then back to a psychiatric hospital. The issue for decision was whether, while in that hospital, he was "in gaol" within s 23(5) and s 1158(1)(a)(i) the Social Security Act 1991 and so disentitled to a disability support pension. (Though this decision was given in circumstances in which s 1158 in its current form applied, his Honour, at 281, cited the pre-1999 version of the section.)
41 The case was not concerned with the operation of s 1158(1)(a)(ii). At 288, his Honour rejected an argument that the legislative intention was that anyone undergoing a course of rehabilitation in respect of a mental illness should not be disentitled from claiming a pension by reason of serving a sentence of imprisonment. For the reasons given, that argument would have been a good one if the operative provision was s 135THA in the form it stood after the 1986 amendments. However, his Honour said: