the legislative scheme
7 Under s 13 of the Veterans' Entitlements Act 1986 (Cth) ("the Act"), the Commonwealth is liable to pay a pension, by way of compensation, to a veteran who has become incapacitated from a war-caused injury or a war-caused disease: s 13(1)(b) and (d). For the purposes of the Act, "war-caused injuries or diseases" are defined in s 9. So far as is relevant for present purposes, that section provides :
"(1) Subject to this section, for the purposes of this Act, an injury suffered by a veteran shall be taken to be a war-caused injury, or a disease contracted by a veteran shall be taken to be a war-caused disease, if :
(a) the injury suffered, or disease contracted, by the veteran resulted from an occurrence that happened while the veteran was rendering operational service;
(b) the injury suffered, or disease contracted, by the veteran arose out of, or was attributable to, any eligible war service rendered by the veteran.
... "
8 "Operational service", for the purpose of the Act, is dealt with in ss 6, 6A, 6B, 6C, 6D, 6E and 6F. Section 6C deals with post World War II service in operational areas. An "operational area" is an area described in column 1 of schedule 2 to the Act during the period specified in column 2 of that schedule. Item 1 in schedule 2 relates to the Korean War. The operational area is described as the area of Korea, including the waters contiguous to the coast of Korea for a distance of 185 kilometres seaward from the coast. The relevant period is from and including 27 June 1950 to and including 19 April 1956.
9 "Operational service" is eligible war service for the purposes of the Act: s 7(1)(a).
10 A claim for a pension is made to the Commission under s 14. The Commission is required to determine the claim for a pension in accordance with the procedure specified in s 19.
11 Section 120 deals with the onus of proof where a claim for a pension, in respect of the incapacity from injury or disease, or death of a veteran, relates to operational service rendered by the veteran. So far as presently relevant, it provides :
"120 Standard of proof
(1) Where a claim under Part II for a pension in respect of the incapacity from injury or disease of a veteran, or of the death of a veteran, relates to the operational service rendered by the veteran, the Commission shall determine that the injury was a war-caused injury, that the disease was a war-caused disease or that the death of the veteran was war-caused, as the case may be, unless it is satisfied, beyond reasonable doubt, that there is no sufficient ground for making that determination.
Note: This subsection is affected by section 120A.
.....
(3) In applying subsection (1) or (2) in respect of the incapacity of a person from injury or disease, or in respect of the death of a person, related to service rendered by the person, the Commission shall be satisfied, beyond reasonable doubt, that there is no sufficient ground for determining:
(a) that the injury was a war-caused injury or a defence-caused injury;
(b) that the disease was a war-caused disease or a defence-caused disease; or
(c) that the death was war-caused or defence-caused;
as the case may be, if the Commission, after consideration of the whole of the material before it, is of the opinion that the material before it does not raise a reasonable hypothesis connecting the injury, disease or death with the circumstances of the particular service rendered by the person.
Note: This subsection is affected by section 120A.
(4) Except in making a determination to which subsection (1) or (2) applies, the Commission shall, in making any determination or decision in respect of a matter arising under this Act or the regulations, including the assessment or re-assessment of the rate of a pension granted under Part II or Part IV, decide the matter to its reasonable satisfaction.
Note: This subsection is affected by section 120B.
(5) Nothing in the provisions of this section, or in any other provision of this Act, shall entitle the Commission to presume that:
(a) an injury suffered by a person is a war-caused injury or a defence-caused injury;
(b) a disease contracted by a person is a war-caused disease or a defence-caused disease;
(c) the death of a person is war-caused or defence-caused; or
(d) a claimant or applicant is entitled to be granted a pension, allowance or other benefit under this Act.
(6) Nothing in the provisions of this section, or in any other provision of this Act, shall be taken to impose on:
(a) a claimant or applicant for a pension or increased pension, or for an allowance or other benefit, under this Act; or
(b) the Commonwealth, the Department or any other person in relation to such a claim or application;
any onus of proving any matter that is, or might be, relevant to the determination of the claim or application.
.....
120A Reasonableness of hypothesis to be assessed by reference to Statement of Principles
(1) This section applies to any of the following claims made on or after 1 June 1994:
(a) a claim under Part II that relates to the operational service rendered by a veteran;
(b) a claim under Part IV that relates to:
(i) the peacekeeping service rendered by a member of a Peacekeeping Force; or
(ii) the hazardous service rendered by a member of the Forces.
Note 1: Subsections 120(1), (2) and (3) are relevant to these claims.
Note 2: For peacekeeping service , member of a Peacekeeping Force , hazardous service and member of the Forces see subsection 5Q(1A).
.....
(3) For the purposes of subsection 120(3), a hypothesis connecting an injury suffered by a person, a disease contracted by a person or the death of a person with the circumstances of any particular service rendered by the person is reasonable only if there is in force:
(a) a Statement of Principles determined under subsection 196B(2) or (11); or
(b) a determination of the Commission under subsection 180A(2);
that upholds the hypothesis.
Note: See subsection (4) about the application of this subsection.
(4) Subsection (3) does not apply in relation to a claim in respect of the incapacity from injury or disease, or the death, of a person if the Authority has neither determined a Statement of Principles under subsection 196B(2), nor declared that it does not propose to make such a Statement of Principles, in respect of:
(a) the kind of injury suffered by the person; or
(b) the kind of disease contracted by the person; or
(c) the kind of death met by the person;
as the case may be."
12 The functions of the Repatriation Medical Authority ("the RMA") are dealt with by s 196B of the Act which, so far as presently relevant, provides :
"196B(2) If the Authority is of the view that there is sound medical-scientific evidence that indicates that a particular kind of injury, disease or death can be related to :
(a) operational service rendered by veterans; or
...
the Authority must determine a Statement of Principles in respect of that kind of injury, disease or death setting out :
(d) the factors that must as a minimum exist; and
(e) which of those factors must be related to service rendered by a person;
before it can be said that a reasonable hypothesis has been raised connecting an injury, disease or death of that kind with the circumstances of that service.
...
(14) A factor causing, or contributing to, an injury, disease or death is related to service rendered by a person if:
(a) it resulted from an occurrence that happened while the person was rendering that service; or
(b) it arose out of, or was attributable to, that service; or
(c) it resulted from an accident that occurred while the person was travelling, while rendering that service but otherwise than in the course of duty, on a journey:
(i) to a place for the purpose of performing duty; or
(ii) away from a place of duty upon having ceased to perform duty; or
(d) it was contributed to in a material degree by, or was aggravated by, that service; or
(e) in the case of a factor causing, or contributing to, an injury - it resulted from an accident that would not have occurred :
(i) but for the rendering of that service by the person; or
(ii) but for changes in the person's environment consequent upon his or her having rendered that service; or
(f) in the case of a factor causing, or contributing to, a disease - it would not have occurred :
(i) but for the rendering of that service by the person; or
(ii) but for changes in the person's environment consequent upon his or her having rendered that service; or
(g) in the case of a factor causing, or contributing to, the death of a person - it was due to an accident that would not have occurred, or to a disease that would not have been contracted :
(i) but for the rendering of that service by the person; or
(ii) but for changes in the person's environment consequent upon his or her having rendered that service."
13 A determination by the RMA is a disallowable instrument for the purposes of s 46A of the Acts Interpretation Act 1901 (Cth).
14 A reasonable hypothesis which connects the injury, disease or death with the circumstances of the particular service rendered by the person for the purposes of s 120(3) may be taken to be a theory, proposition, suggestion or postulation which suggest reasonably, although without proof, that some event in, or aspect of the service rendered by a veteran may be linked to the injury, disease or death of the veteran: Byrnes v Repatriation Commission (1993) 177 CLR 564 at 571; Repatriation Commission v Keeley (2000) 98 FCR 108 at [11].
15 The steps to be taken by the AAT in a case such as the present were identified in Repatriation Commission v Deledio (1998) 83 FCR 82. Their Honours said (at 97 - 98) :
"1. The Tribunal must consider all the material which is before it and determine whether that material points to a hypothesis connecting the injury, disease or death with the circumstances of the particular service rendered by the person. No question of fact finding arises at this stage. If no such hypothesis arises, the application must fail.
2. If the material does raise such a hypothesis, the Tribunal must then ascertain whether there is in force an SoP determined by the Authority under s 196B(2) or (11). If no such SoP is in force, the hypothesis will be taken not to be reasonable and, in consequence, the application must fail.
3. If an SoP is in force, the Tribunal must then form the opinion whether the hypothesis raised is a reasonable one. It will do so if the hypothesis fits, that is to say, is consistent with the 'template' to be found in the SoP. The hypothesis raised before it must thus contain one or more of the factors which the Authority has determined to be the minimum which must exist, and be related to the person's service (as required by ss 196B(2)(d) and (e)). If the hypothesis does contain these factors, it could neither be said to be contrary to proved or known scientific facts, nor otherwise fanciful. If the hypothesis fails to fit within the template, it will be deemed not to be 'reasonable' and the claim will fail.
4. The Tribunal must then proceed to consider under s 120(1) whether it is satisfied beyond reasonable doubt that the death was not war-caused, or in the case of a claim for incapacity, that the incapacity did not arise from a war-caused injury. If not so satisfied, the claim must succeed. If the Tribunal is so satisfied, the claim must fail. It is only at this stage of the process that the Tribunal will be required to find facts from the material before it. In so doing, no question of onus of proof or the application of any presumption will be involved."