Statement of Principles concerning Alzheimer disease (Balance of Probabilities) (No. 34 of 2019)

The central concept is the balance of probabilities standard, which applies because this SoP is made under subsection 196B(3) of the VEA (not subsection 196B(2) which deals with the reasonable hypothesis standard for operational service). The instrument explicitly states in section 5 that it applies to claims under section 120B of the VEA or section 339 of the MRCA. These provisions direct decision‑makers to apply a Statement of Principles when determining whether an injury or disease is related to service on the balance of probabilities.

Alzheimer disease is defined in subsection 7(2) using the DSM‑5 criteria for major or mild neurocognitive disorder. The definition requires insidious onset, gradual progression without extended plateaus, and either a causative genetic mutation or clear evidence of decline in memory and learning (except atypical presentations where memory predominance is not required). Importantly, the definition excludes cognitive deficits primarily due to a long list of alternative causes: delirium, major depressive disorder, schizophrenia, cerebrovascular disease, Lewy body disease, Parkinson’s disease, Huntington’s chorea, brain tumour, subdural haematoma, substance use, hypothyroidism, vitamin B12 or folic acid deficiency, niacin deficiency, hypercalcaemia, neurosyphilis, and HIV infection. This exclusionary list is part of the definition, not just a differential diagnosis list. A veteran who meets the clinical criteria but also has, for example, cerebrovascular disease significant enough to be considered a primary cause of cognitive decline, will not be considered as having Alzheimer disease for the purposes of this SoP. The ICD‑10‑AM codes G30.0, G30.1, G30.8 and G30.9 are cited but the instrument states that the meaning of Alzheimer disease is the one given in the subsection, not the ICD code.

The eight factors in section 9 each involve a specific exposure, condition, or circumstance. Most require the factor to have existed for a defined period before clinical onset. The timing is critical: cessation of smoking must occur within five years of onset; obesity, dyslipidaemia, diabetes, hyperhomocysteinaemia, and physical inactivity require at least ten years of existence before onset. Therapeutic radiation requires at least ten years before onset. The dyslipidaemia factor additionally requires that the condition be present before the age of 65. The physical inactivity factor uses the MET (metabolic equivalent) concept: inability to undertake activity greater than three METs for at least five years, at least ten years before onset. This excludes mild to moderate exertion such as casual walking.

The concept of ‘relationship to service’ in section 10 is critical. For factors 1 through 7, the existence of the factor must be related to the relevant service rendered by the person. This means the veteran must prove not only that the factor exists (e.g., smoking, obesity, dyslipidaemia) but also that the factor was caused or contributed to by the person’s service. For example, a veteran who smoked 20 pack‑years but started smoking after discharge and not due to service circumstances would not satisfy the factor because the smoking was not related to service. For factor 8 (inability to obtain appropriate clinical management), subsection 10(2) imposes a narrower test: it applies only to material contribution to or aggravation of Alzheimer disease where the person’s Alzheimer disease was suffered or contracted before or during (but did not arise out of) the person’s relevant service. This factor can therefore only help a veteran whose Alzheimer disease existed prior to service and was made worse by lack of clinical management during service.

This SoP directly affects veterans or members of the Forces who have ‘relevant service’ within the meaning of the Schedule 1 dictionary: eligible war service (other than operational service) under the VEA, defence service (other than hazardous service and British nuclear test defence service) under the VEA, or peacetime service under the MRCA. It does not apply to claims involving operational service under the VEA or hazardous service under the MRCA, which are assessed under a different standard (reasonable hypothesis) and a separate SoP made under subsection 196B(2). Therefore, the primary affected group is veterans who served in peacetime or during periods of eligible war service that is not classified as operational (e.g., many periods of service during the Vietnam War era for those who did not serve in a combat zone, or peacetime service after 1972).

The instrument also affects defence force members covered by the MRCA for peacetime service. These are current or former permanent members of the Australian Defence Force (ADF) whose service is not classified as hazardous service. The SoP binds the Repatriation Commission, the Military Rehabilitation and Compensation Commission, the Veterans’ Review Board, and the Administrative Appeals Tribunal when assessing claims for compensation or pension for Alzheimer disease.

Medical practitioners and specialists are indirectly affected because the diagnostic definition in subsection 7(2) imposes specific criteria that may not align with routine clinical diagnosis. A veteran’s treating neurologist or geriatrician might diagnose Alzheimer disease based on clinical presentation and imaging, but the SoP requires formal exclusion of numerous alternative causes and documentation of DSM‑5 major or mild neurocognitive disorder criteria. This may force veterans to undergo additional testing (e.g., genetic testing, cerebrospinal fluid analysis, or more detailed neuropsychological assessment) to satisfy the definition.

Legal practitioners and advocates handling veterans’ claims must understand the factor list, the temporal requirements, and the relationship to service requirement. They must gather evidence not only of the Alzheimer diagnosis per the SoP, but also of each element of the factor (e.g., smoking history in pack‑years, BMI records over a decade, lipid profiles before age 65). The instrument imposes significant evidentiary burdens, particularly for factors requiring ten years of existence before clinical onset. Many veterans may not have medical records stretching back that far, especially if they were asymptomatic and not undergoing regular health checks.

The SoP also indirectly affects family members and dependants who may be entitled to pension or compensation upon the veteran’s death from Alzheimer disease. The definition of death from Alzheimer disease in subsection 7(5) includes death from a terminal event contributed to by the Alzheimer disease. Terminal event is defined broadly to include pneumonia, respiratory failure, cardiac arrest, circulatory failure, or cessation of brain function. This widens the scope of claims, but the underlying factor must still be satisfied.

The instrument imposes no duties on private parties; it is a rule of evidence and causation that binds decision‑makers. However, it creates a de facto duty on claimants to produce evidence that falls within the defined factors. The right of a veteran with relevant service is to have their claim assessed against these factors; if at least one factor is satisfied and related to service, the decision‑maker must find in favour of the connection (subject to other provisions of the VEA and MRCA). Conversely, the decision‑maker has a duty to reject the claim if no factor is satisfied.

The right to rely on factor 8 (inability to obtain appropriate clinical management) is constrained. Subsection 10(2) states that this factor applies only to material contribution to or aggravation of Alzheimer disease where the disease was suffered or contracted before or during (but did not arise out of) the person’s relevant service. This means a veteran cannot use factor 8 to establish a causal link if the Alzheimer disease first manifested after service, unless the disease existed before service and was aggravated by lack of clinical management during service. In practice, factor 8 is likely to be of limited utility because most Alzheimer disease cases have onset in old age, well after service ends, and the disease would not have been contracted during service.

Claimants also have the right to have the SoP applied as at the date of the decision, with reference to the current version in force. Section 11 provides that where a factor (e.g., diabetes mellitus) refers to an injury or disease covered by another Statement of Principles, the factors in that other SoP apply as in force from time to time. This creates a dynamic cross‑reference: to establish diabetes mellitus as a factor, the veteran must satisfy the factors in the current diabetes SoP, not the one that existed at the time of the original claim.

There is no right to have the SoP itself reviewed on its merits. The SoP is a legislative instrument made by the Repatriation Medical Authority, and while it can be challenged by judicial review on procedural or jurisdictional grounds, the decision‑maker cannot depart from it. This means that a veteran who has compelling medical evidence of causation that does not match the listed factors has no avenue to succeed on the balance of probabilities. The only recourse would be to argue that the SoP is invalid or does not apply because the veteran’s service is operational (in which case the reasonable hypothesis SoP applies) or because the definition of Alzheimer disease is not met.

The SoP itself does not create any penalties or enforcement mechanisms. It is not a prohibitory or regulatory instrument; it is an evidentiary and causative instrument that guides the assessment of claims under the VEA and MRCA. No person can be penalised for breaching this SoP. However, false or misleading statements made in connection with a claim under the VEA or MRCA may attract penalties under those Acts (e.g., section 139 of the VEA for false statements), but those penalties are not part of this instrument.

Enforcement of the SoP occurs through the claims determination process. If the Repatriation Commission fails to apply the SoP correctly, the veteran can seek review by the Veterans’ Review Board and then the Administrative Appeals Tribunal. The Tribunal may set aside the decision and substitute its own, but it must apply the SoP as it stands. The Federal Court may review a decision of the Tribunal on a question of law, including whether the Tribunal misapplied the SoP or acted beyond jurisdiction. The SoP itself does not provide for any appeal against the Authority’s determination; the instrument is reviewable under the Legislative Instruments Act 2003 (now the Legislation Act 2003) for procedural compliance, but that is not a merits review.

The practical consequence of non‑application by a decision‑maker is that a veteran may be wrongly denied compensation. That is not a penalty but an error of law. Conversely, if a decision‑maker incorrectly finds a factor satisfied when it is not, a veteran might receive compensation to which they are not entitled, but that is not penalised either; the Commission could seek to recover overpayments.

The instrument does not contain any offence provisions, nor does it delegate any enforcement power. It is purely a rule of decision‑making.

This SoP is made under section 196B(3) of the VEA and operates within the broader framework of the VEA and the MRCA. It replaces the earlier SoP concerning Alzheimer‑type dementia No. 23 of 2010, which is repealed by section 4. Any claim determined after 25 March 2019 must be assessed under this new SoP, even if the claim was lodged earlier.

The “reasonable hypothesis” SoP for operational service (made under subsection 196B(2) of the VEA) is a separate instrument. This SoP specifically applies only to relevant service as defined, which expressly excludes operational service. A veteran with operational service who cannot satisfy the reasonable hypothesis SoP cannot rely on this balance of probabilities SoP to establish a connection. The two SoPs coexist but apply to different populations.

Section 11 of this SoP provides that if a factor refers to another disease covered by a separate Statement of Principles (e.g., diabetes mellitus, dyslipidaemia, obesity, hyperhomocysteinaemia), the factors in that other SoP apply as in force from time to time. This creates an interlocking system: to prove the diabetes factor under this SoP, the veteran must also satisfy the relevant factors in the diabetes SoP (made under subsection 196B(3) or (2) as applicable). This can compound the evidentiary burden: the veteran needs not only to show ten years of diabetes before Alzheimer onset, but also that the diabetes itself is related to service under the diabetes SoP.

The definition of Alzheimer disease excludes cases primarily due to cerebrovascular disease, other neurodegenerative diseases, and systemic disorders. This means that if a veteran has vascular dementia or mixed dementia, they will not be considered as having Alzheimer disease under this instrument, even if their clinical diagnosis includes Alzheimer components. They would need to claim under a different SoP (e.g., the cerebrovascular disease SoP). The instrument does not allow for partial attribution.

The relationship to service requirement in section 10(1) means that the factor must be related to the person’s relevant service. This invokes the general causation principles under the VEA and MRCA. For example, obesity related to service could be established if the veteran gained weight due to a service‑related injury that limited physical activity. The SoP does not itself define what makes a factor related to service; that is determined by other provisions of the VEA and MRCA and by case law.

This instrument is Statement of Principles concerning Alzheimer disease (Balance of Probabilities) No. 34 of 2019. It was made on 1 March 2019 and commenced on 25 March 2019. It repealed the earlier Statement of Principles concerning Alzheimer‑type dementia No. 23 of 2010 (Federal Register of Legislation No. F2014C00072), which had been made under both subsections 196B(3) and (8) of the VEA. The 2010 instrument thus covered both balance of probabilities and reasonable hypothesis, whereas the 2019 instrument splits these into separate instruments. There is a corresponding reasonable hypothesis SoP (No. 33 of 2019) that covers operational service. The source does not provide the text of that instrument, but the structure implies that the Authority now issues paired SoPs for each disease: one for the balance of probabilities standard and one for the reasonable hypothesis standard.

The repeal of the 2010 SoP means that any claim determined after 25 March 2019 must be assessed under the 2019 instrument. Claims determined before that date are not affected, but pending claims that were not finally determined may need to be assessed under the new instrument if the decision is made after commencement. The source does not specify any transitional provisions, but the general rule is that the law as at the date of decision applies.

The instrument is a legislative instrument registered on the Federal Register of Legislation. It may be amended or revoked by a later instrument. The Repatriation Medical Authority reviews Statements of Principles periodically based on new sound medical‑scientific evidence. The five‑year gap between the 2010 and 2019 instruments suggests regular review cycles. The source does not indicate any amendments to this instrument after its commencement. No explanatory statement or supplementary material is included in the source.

The source does not cite any litigation history. As a recently made legislative instrument (2019), there may not yet be any reported decisions applying or challenging this specific SoP. The earlier 2010 SoP may have been the subject of litigation in the Administrative Appeals Tribunal or Federal Court, but those cases are not referenced in the source. The current instrument has been in force for several years, and it is possible that decisions of the Veterans’ Review Board or AAT have considered its application. However, the user’s source does not mention any such cases, and the instruction requires that we only name cases the source names. Therefore, we cannot discuss any specific litigation.

It is worth noting that Statements of Principles generally are subject to judicial review only on limited grounds: procedural error in the Authority’s decision‑making (e.g., failure to consider certain evidence), or that the instrument is beyond power. The substantive medical judgment of the Authority is rarely disturbed. The High Court in Repatriation Commission v Gorton (2001) confirmed the binding nature of SoPs. Since this instrument is materially similar in structure to other SoPs, challenges would likely focus on whether the diagnostic definition or the factors are supported by sound medical‑scientific evidence. But without a specific case cited, we cannot opine on the outcome.

The most significant trap is the diagnostic definition in subsection 7(2). Many veterans who carry a clinical diagnosis of Alzheimer disease will not meet the DSM‑5 criteria as applied by this instrument, particularly if they have mixed dementia with a vascular component, or if they have not undergone formal neuropsychological testing to document the level of cognitive impairment as major or mild neurocognitive disorder. The requirement to exclude a long list of alternative causes as the primary aetiology means that the presence of any of those conditions could defeat the diagnosis, even if the clinician believes Alzheimer pathology is also present.

The temporal windows in the factors are strict. For factor 1 (smoking), the clinical onset must occur within five years of cessation. A veteran who quit smoking 10 years before the onset of Alzheimer disease will not satisfy factor 1, even if they smoked 100 pack‑years. For factors 3 through 7, the condition must have existed for at least ten years before onset. This means the veteran must have been obese, diabetic, dyslipidaemic, hyperhomocysteinaemic, or physically inactive for a full decade before the disease manifested. If the condition developed only 8 years before onset, the factor fails. Obtaining medical records from 10+ years ago can be extremely difficult, especially for defence service that may have ended decades earlier.

Factor 4 (dyslipidaemia) has an additional age cap: the dyslipidaemia must be present before age 65 and for at least ten years before onset. A veteran who develops dyslipidaemia at age 66 will never satisfy this factor, even if it persists for 20 years before Alzheimer onset. There is no such age cap for the other factors.

Factor 7 (physical inactivity) uses the MET definition. Inability to undertake any physical activity greater than three METs for at least five years. Three METs is the energy expenditure of slow walking or light household tasks. Many veterans who are chair‑bound or severely arthritic may meet this, but they need to prove the inability existed for at least five years, at least ten years before onset. This requires objective medical evidence of functional limitation over that period.

Factor 8 (inability to obtain appropriate clinical management) is almost impossible for a veteran who developed Alzheimer disease after service, because it only applies to aggravation of a pre‑existing condition. Since Alzheimer disease typically has insidious onset in later life, it is rare that a veteran would have contracted the disease before or during service. Moreover, the factor only applies if the inability to obtain clinical management was related to service (e.g., the veteran was posted to a remote location with no access to neurologists). This is a narrow exception.

Another trap is the relationship to service requirement for factors 1 through 7. Even if a veteran satisfies all the quantitative criteria for smoking or obesity, they must also show that the smoking or obesity was related to their service. A veteran who smoked heavily but started after discharge, or who was obese before enlistment and remained obese throughout service, will likely fail. The SoP does not define “related to service” - it is a general causation question under the VEA.

The interplay with other Statements of Principles under section 11 can add another layer of complexity. To prove dyslipidaemia as a factor, the veteran must satisfy the current dyslipidaemia SoP (which may have its own temporal and definitional requirements). If the dyslipidaemia SoP requires a specific serum lipid threshold and the veteran’s records show only borderline values, the factor may not be established.

For a claimant (veteran or their representative), the first step is to determine whether the veteran has relevant service as defined. This requires checking service records: eligible war service (non‑operational), defence service (non‑hazardous, non‑British nuclear test), or peacetime service under MRCA. If the veteran has operational service, this SoP does not apply; a different SoP under subsection 196B(2) will govern.

Second, obtain a formal diagnosis of Alzheimer disease that meets the definition in subsection 7(2). This means securing a comprehensive neuropsychological assessment documenting DSM‑5 major or mild neurocognitive disorder, with evidence of insidious onset, gradual progression, and exclusion of the listed alternative causes. The diagnosing specialist should specifically address each exclusion criterion (e.g., “no evidence that cognitive deficits are primarily due to cerebrovascular disease”). A standard GP diagnosis of “Alzheimer disease” or “dementia” is insufficient.

Third, identify which factor(s) in section 9 might apply and gather evidence to support each element. For smoking (factor 1): obtain detailed smoking history including pack‑years calculation, and evidence of the date of clinical onset of Alzheimer disease to show that onset occurred within five years of cessation. For obesity (factor 3): obtain medical records documenting BMI of 30 or greater at least ten years before clinical onset. For dyslipidaemia (factor 4): obtain fasting lipid profiles showing total cholesterol ≥ 5.5 mmol/L, triglycerides ≥ 2.0 mmol/L, or HDL < 1.0 mmol/L, with the first abnormal result before age 65 and at least ten years before onset. For diabetes (factor 5): obtain diagnosis and evidence that it existed for at least ten years before onset. For hyperhomocysteinaemia (factor 6): obtain blood test results showing elevated homocysteine at least ten years before onset. For physical inactivity (factor 7): obtain medical evidence of functional limitation to less than 3 METs for at least five consecutive years, ending at least ten years before onset. For radiation (factor 2): obtain oncology records showing radiation to brain at least ten years before onset.

Fourth, for factors 1 through 7, link the factor to service. This requires evidence that the smoking, obesity, dyslipidaemia, diabetes, hyperhomocysteinaemia, physical inactivity, or radiation was caused or contributed to by the veteran’s service. For example, service may have involved exposure to environmental triggers for diabetes, or an injury that caused physical inactivity. This is often the most difficult step.

Fifth, for factor 8, demonstrate that the veteran’s Alzheimer disease existed before or during service (rare), and that during service they were unable to obtain appropriate clinical management, and that this inability materially contributed to aggravation of the disease.

Sixth, if the factor depends on another disease (e.g., diabetes, dyslipidaemia), check the current Statement of Principles for that disease to ensure that the veteran also meets the factors for that disease, and that those factors are themselves related to service.

Throughout, gather contemporaneous medical records and service documents. The longer the latency, the harder to find records. If records are missing, consider obtaining a detailed medical history from the veteran and corroborating witness statements, but note that the SoP requires objective evidence in many places (e.g., BMI, lipid profiles, pack‑year calculation). The decision‑maker will apply the balance of probabilities, but the instrument’s specificity reduces the scope for inference or clinical judgment.

Finally, present the claim in a structured way, referencing each factor relied upon, and showing how each element of the factor is satisfied with reference to the definitions in Schedule 1. Cite the relevant provisions of the SoP. Engage an advocate experienced in veterans’ law if possible, as the web of cross‑referenced SoPs and temporal requirements is complex.