Statement of Principles concerning knee bursitis (Reasonable Hypothesis) (No. 65 of 2018)

Reasonable hypothesis. This is a low evidentiary threshold under VEA section 120(1) and (3). The hypothesis must be possible, plausible, and consistent with the SoP. The SoP provides a checklist of factors that must exist at least one. If the claimant’s hypothesis does not match the listed factors, it cannot be a reasonable hypothesis. The instrument thus constrains the hypothesis to a narrow set of medically approved causal pathways.

Knee bursitis definition. Subsection 6(2) defines knee bursitis as “inflammation or infection of a bursa around the knee” and expressly excludes Baker’s cyst. The ICD-10-AM codes M70.4 (prepatellar bursitis) and M70.5 (other bursitis of knee) are referenced but are not binding; the definition in the SoP is the authoritative one. This can create confusion if a medical report uses different diagnostic criteria.

Subtype specificity. The instrument separates knee bursitis into at least eight subtypes for factor purposes: prepatellar, superficial infrapatellar, pretibial, medial collateral ligament, medial compartment, pes anserine, septic, and a residual category. Many factors are subtype-specific. For example, factor (2) (kneeling) applies only to prepatellar or superficial infrapatellar bursitis. Factor (3) (medial knee pressing) applies only to medial collateral ligament bursitis. A claimant with a diagnosis of “knee bursitis not otherwise specified” may struggle to raise a hypothesis unless the specific subtype is identified.

Clinical onset versus clinical worsening. The instrument mirrors many SoPs by providing separate factor lists for first onset (factors 1-11) and for worsening (factors 12-22). Factor 23 (inability to obtain appropriate clinical management) applies to both. Section 9(2) makes clear that the worsening factors apply only where the knee bursitis was suffered or contracted before or during (but did not arise out of) the relevant service. This prevents claimants from using a worsening factor to backdate a condition that arose after service.

Relationship to service. Section 9(1) requires that every factor in section 8 “be related to the relevant service” of the person. This incorporates the usual causation chain: the factor itself must be causally connected to service. For example, running 30 kilometres per week must have occurred because of service duties, not recreational jogging on leave. This elevates the evidentiary burden: it is not enough to show the factor existed; the claimant must also show that service caused the factor.

Dictionary definitions. The schedule defines several key terms: immunocompromised state as specified (HIV, immunosuppressive drugs, malignancy, chronic renal failure, severe malnutrition, transplantation); specified list of diseases (ankylosing spondylitis, gout, rheumatoid arthritis, sarcoidosis etc.); significant biomechanical abnormality (genu valgum, collateral ligament instability); terminal event (pneumonia, respiratory failure etc.). These definitions are precise and some are restrictive. For instance, “chronic renal failure” requires a GFR below 15 mL/min for three months or dialysis, which is end-stage. This narrowness may exclude claimants with moderate renal impairment who are still immunocompromised.

Interaction with other SoPs. Section 10 provides that if a factor in section 8 “refers to an injury or disease” covered by another SoP, then the factors in that other SoP apply. For example, factor (9) (having a disease from the specified list) includes rheumatoid arthritis. A claimant with rheumatoid arthritis would need to satisfy the rheumatoid arthritis SoP to establish that disease itself as service-related. This creates a chain of causation that multiplies the evidentiary hurdles.

The instrument directly affects any person claiming a pension or compensation under the VEA or MRCA for knee bursitis or death from knee bursitis. This includes veterans with operational, peacekeeping, hazardous, or British nuclear test defence service under the VEA, and members with warlike or non-warlike service under the MRCA (see definition of “relevant service” in Schedule 1). It also affects their dependants in death claims.

Indirectly, it imposes burdens on decision-makers in the Department of Veterans’ Affairs (DVA) and the Military Rehabilitation and Compensation Commission (MRCC) who must apply the SoP when processing claims. Medical advisers and treating practitioners are affected because they must provide clinical reports that address the specific factors, often requiring quantifiable evidence (e.g. distance run, hours knelt, date of trauma). This can increase consultation time and cost.

The instrument also affects the Repatriation Medical Authority itself, which has a statutory duty to keep SoPs under review. By issuing this instrument, the Authority has effectively codified its view of the medical science. Future research challenging the thresholds or causal pathways would need to be submitted to the Authority for possible revocation or amendment.

There is no direct effect on private citizens outside the military compensation system. But the instrument is a precedent in the sense that identical or similar SoPs exist for other musculoskeletal conditions, and the structured factor approach is typical. Lawyers and advocates specialising in military law must be familiar with the subtype distinctions and the dictionary definitions, as an error in diagnosis naming can doom a claim.

From a market perspective, the instrument reduces the scope for discretionary decision-making and standardises outcomes, which is efficient for administrators. But it imposes search costs on claimants and their representatives to locate service records that prove quantitative factors like cumulative kneeling hours. These costs fall disproportionately on older veterans whose records may be sparse. The instrument also narrows the set of acceptable causal narratives, potentially excluding genuine cases where the precise subtype is unrecorded or the causal pathway does not match a listed factor.

The SoP itself does not create duties for individuals. It is a decision-making rule for the Commonwealth. However, it gives rise to a right in a claimant: if the claimant can satisfy the SoP by raising a reasonable hypothesis, the decision-maker must accept the condition as service-related unless the contrary is proved. That right is circumscribed by the instrument’s definitions and factor lists.

The chief duty is on the Repatriation Medical Authority under section 196B VEA to determine SoPs only when there is “sound medical-scientific evidence”. This duty is procedural and is not privately enforceable. The instrument at section 7 recites that the Authority is of that view; but it provides no basis for a claimant to challenge the thresholds as unsound.

For decision-makers, there is a duty to apply the SoP to each claim. They must identify the correct subtype of knee bursitis, determine which factor or factors from section 8 might apply, and then decide whether each factor is related to the person’s relevant service. If the claimant raises a factor that is not listed, the decision-maker must reject the hypothesis. This is a binary test: either the factor is in section 8 or it is not. There is no discretion to consider other causal pathways.

Claimants have the right to submit medical evidence that addresses the factors. For instance, a veteran with prepatellar bursitis can submit a diary showing kneeling hours on a ship. However, the burden of proof is on the claimant to raise the hypothesis; the decision-maker does not proactively search for factors. This is a key practical right: the claimant must identify the factor in their claim and support it with evidence.

There is also a right, under section 10, to rely on another SoP if a listed factor involves a disease covered elsewhere. This can be used strategically: if a claimant has rheumatoid arthritis that is already accepted as service-related, that can satisfy factor (9) without further proof. Conversely, if the rheumatoid arthritis is not accepted, the claimant must first satisfy the rheumatoid arthritis SoP, which may involve its own factor thresholds.

No right of review is created by this instrument. Review rights come from the VEA and MRCA (e.g. to the Veterans’ Review Board and the Administrative Appeals Tribunal). The SoP is binding on those review bodies.

This instrument imposes no penalties on any person. It is a legislative rule, not a penal law. Enforcement mechanisms are found in the parent Acts: false or misleading statements in support of a claim can lead to loss of pension or prosecution under the Criminal Code. The SoP itself is not directly enforced; rather it is a rule that determines whether a claim is granted or denied.

If a claimant knowingly provides false evidence to satisfy a factor (e.g. fabricating a running log), the usual penalties for fraud in Commonwealth compensation law apply. There is no penalty for failing to comply with the SoP because it is not a regulatory duty.

For decision-makers, failure to apply the SoP correctly can lead to the claim being overturned on review. The instrument does not create any cause of action for negligence or misfeasance. A wrong decision may be set aside or varied, but no penalty attaches.

Thus the enforcement weight of the SoP is entirely administrative and review-based. It is a gatekeeping instrument: if the factor is present, the gate opens; if not, it stays shut. The practical pressure is on claimants to find evidence that fits the factors, and if they cannot, the claim will be denied regardless of the underlying merits. This creates an incentive to over-diagnose subtypes or retrospectively quantify activities in a way that matches the thresholds - a potential source of moral hazard.

The instrument is made under section 196B(2) VEA and is a legislative instrument subject to the Legislation Act 2003. It sits within the hierarchy of the VEA and MRCA. It does not override the standard of proof rules in those Acts: the reasonable hypothesis standard under VEA section 120(1) remains, but the SoP defines what can constitute a reasonable hypothesis. If the SoP is invalid (e.g. for procedural error), the claim is decided without it.

The instrument does not affect any other law concerning knee bursitis. It has no application to workers’ compensation, motor vehicle accident claims, or private health insurance. Military compensation is a statutory scheme separate from tort or contract.

Section 10 creates an important interaction with other SoPs. If a factor refers to an injury or disease for which another SoP exists, the factors in that other SoP must be satisfied. This chains the reasoning: to use factor (9) (specified list of diseases) the claimant must first have the listed disease accepted as service-related under its own SoP. This multiplies the evidentiary hurdles for comorbid conditions.

The instrument also interacts with the Veterans’ Entitlements Act 1986 provisions on multiple conditions. Where a veteran has more than one condition, each is assessed under its own SoP. There is no provision for synergy or cumulative causation across SoPs.

The instrument is subordinate to any amendment or revocation by the Repatriation Medical Authority. It has no fixed sunset date. It commenced on 23 July 2018 and remains in force until superseded. The Authority periodically reviews SoPs; a new instrument may be issued if the medical evidence changes.

No other Commonwealth, state, or territory law is supplanted or amended by this instrument. It does not create a cause of action or impose a tax.

The instrument is numbered No. 65 of 2018, dated 22 June 2018, and commenced on 23 July 2018. The source text provided does not include any amending instruments. No subsequent amendments are listed or referred to in the text. It is possible that amendments have been made since 2018 but that they are not part of the provided source. Based solely on the source, the instrument has never been amended.

Statements of Principles are often replaced rather than amended. The Authority issues a new SoP (e.g. “No. 10 of 2021”) that revokes the old one. The index of legislation on the Federal Register of Legislation would show the current status. For the purpose of this deep dive, we treat this instrument as originally enacted and still in force unless the reader checks the current register.

No explanatory statement or regulation impact statement is provided. The instrument was made under a legislative power that does not require disallowance (subsection 196B(5) VEA exempts SoPs from disallowance under the Legislation Act). This means the instrument is not subject to parliamentary scrutiny. The Authority alone decides the content and timing.

Given the absence of amendment history, the instrument remains a snapshot of the medical evidence as assessed in 2018. The thresholds for running (30 km/week) and kneeling (60 hours) have not been adjusted for changes in military training or equipment. There is no grandfather clause for previously accepted claims. Each new claim is assessed against the current instrument.

The source text does not refer to any litigation. No cases are named. However, SoPs in general are frequently litigated in the Administrative Appeals Tribunal and the Federal Court, often on the grounds that the Repatriation Medical Authority failed to consider relevant medical evidence or applied an incorrect definition.

Specific to knee bursitis, the high degree of subtype specificity is ripe for argument. A claimant might argue that their bursitis, though not precisely fitting the named subtypes, should be assessed under a residual category, and that the factor thresholds are arbitrary. The exclusion of Baker’s cyst might also be challenged if the cyst is inflamed and symptomatic, as it could be argued to be a form of bursitis.

No known authoritative decision has overruled this particular instrument. The Repatriation Medical Authority has strong deference from courts, which generally uphold the SoP unless it is capricious or irrational. The Lees v Repatriation Commission line of authority establishes that the SoP limits the scope of the reasonable hypothesis, but the hypothesis itself can be based on factors that are not listed if there is medical evidence outside the SoP. However, that line is narrow and rarely used.

The practical litigation strategy is to challenge the application of the factors to the facts, not the instrument itself. For example, a dispute over whether the claimant’s activities qualified as “kneeling” or “crawling” under factor (2) might reach the Tribunal.

Because no specific litigation history is provided, we cannot report any. The reader should treat the SoP as legally unchallenged in the public record as of the instrument date.

Subtype misdiagnosis. A general diagnosis of “knee bursitis” without specifying the precise bursa will make it impossible to match the subtype-specific factors. Claimants need a specialist opinion naming prepatellar, infrapatellar, pretibial, medial collateral, pes anserine, or septic. If the diagnosis is vague, the claim will likely fail no matter what service records show.

Quantitative thresholds are rigid. Factor (1) requires an average of 30 kilometres per week of running for four weeks. Factor (2) requires 60 cumulative hours of kneeling/crawling/pressing within two months. A claimant who ran 29 km per week or knelt for 59 hours fails exactly. There is no room for approximation or “almost”. The source does not explain how “average” is to be calculated over a four week period; presumably total distance divided by four, but if service records only cover three weeks, it may be impossible to meet.

Worsening factors are limited. A claimant whose knee bursitis arose after service (e.g. due to recreational running) cannot use factors 12-22. Those factors only apply if the bursitis was suffered before or during service but not arising out of service. Most post service conditions require a different causal pathway, which may not exist.

Immunocompromised state definition is narrow. The schedule defines “chronic renal failure” as end-stage (GFR <15 or dialysis). A moderate chronic kidney disease that still impairs immunity does not qualify. Similarly, “immunosuppressive drug” excludes inhaled and topical corticosteroids, even though they can have systemic effects in high doses. Claimants relying on this factor should check the exact drug list.

Trauma examples are illustrative only. The notes to factor (4) list “cuts, abrasions, lacerations, repeated knocking, needle aspiration, wearing prosthesis” but do not limit it. A claimant with a single blunt trauma may still satisfy the factor, but the key is that the trauma must be to the “affected knee bursa” within 30 days of onset or worsening. The exact timing must be proved.

Inability to obtain appropriate clinical management (factor 23) is a residual factor that is often difficult to prove. It requires showing that the veteran could not access treatment (e.g. due to remote posting) and that this inability contributed to the condition. The Repatriation Medical Authority has not defined “appropriate” in this context, which gives decision-makers some discretion but also uncertainty.

Section 10 chain. If a factor refers to a disease in the specified list (e.g. rheumatoid arthritis), the claimant must satisfy the rheumatoid arthritis SoP as well. That SoP may have its own high thresholds. This creates a compound burden. For example, factor (9) requires a disease from the list to exist at the time of clinical onset, but the disease itself must be service-related under its own SoP. A claimant who has rheumatoid arthritis but cannot prove it is service-related cannot use factor (9) as a shortcut.

No other causal pathways. The instrument is exhaustive. Any causal theory that does not match one of the 23 factors cannot succeed. This excludes, for example, bursitis caused by repetitive non kneeling activities like prolonged walking, unless it meets the running factor. If the medical literature later supports other causes (e.g. genetics, obesity), the instrument would need to be amended. Until then, those claims fail.

Terminal event definition. For death claims, knee bursitis must contribute to a terminal event like pneumonia or cardiac arrest. Death from knee bursitis alone is rare. The definition in the schedule lists only five terminal events. Other potential causes (e.g. sepsis directly from septic bursitis) might not be covered if they do not fit those five.

For a claimant, compliance means substantiating a link between knee bursitis and service that fits within the defined factors. There is no alternative pathway. The steps are:

1. Obtain a precise medical diagnosis. The treating specialist must identify the exact bursa affected: prepatellar, superficial infrapatellar, pretibial, medial collateral ligament, pes anserine, etc. If the bursitis is septic, that must be noted. A general diagnosis will not suffice.

2. Identify the relevant service period. The service must be “relevant service” under VEA or MRCA as defined in the schedule. Operational, peacekeeping, hazardous, British nuclear test, warlike, or non-warlike service. Service records should be gathered to prove the nature of the service.

3. Map the condition to a factor in section 8. For onset claims, review factors 1-11. For worsening claims, review factors 12-22. If the condition is prepatellar or superficial infrapatellar, factor (2) (kneeling etc.) is the most obvious. If medial collateral ligament bursitis, factor (3) (medial knee pressing) applies. If other bursitis, factor (1) (running) may apply. If septic, factors (6) or (7) might apply. If any factor involves a disease from the specified list, that disease must be separately accepted.

4. Gather quantitative evidence. For factor (2), evidence of cumulative kneeling hours within two months before onset. Service records, witness statements, logs, or medical notes referencing kneeling at work. For factor (1), weekly running distance over four weeks. This may be difficult if running was recreational; it must be “related to relevant service” (section 9). If running was part of mandatory physical training, service records may help.

5. Document trauma or surgery. For factors (4) or (5), provide medical records showing trauma or surgery to the knee within 30 days before onset or worsening. Notes of needle aspiration, prosthesis use, or lacerations should be obtained.

6. Prove the factor relates to service. Section 9(1) requires that the factor itself be related to service. For example, if the factor is kneeling, the claimant must show that the kneeling occurred in the course of service duties, not in a part-time civilian job. This often requires linking each instance of kneeling to a specific service event.

7. If claiming worsening, ensure that the knee bursitis existed before or during service (but not arising out of it). Provide evidence of the pre-service diagnosis. Then show that one of factors 12-22 is present and service-related.

8. Consider factor (23) as a fallback. If no specific causal factor applies, gather evidence that appropriate clinical management was unavailable (e.g. remote posting, delayed evacuation, lack of antibiotics). This factor is hard to prove and should not be the primary strategy.

9. Engage a medical specialist to write a report. The report should state the diagnosis, subtype, and explicitly link a factor from section 8 to the claimant’s service. The specialist should cite the SoP and confirm that the factor existed and was caused by service.

10. Submit a complete claim. Include all medical records, service records, evidence of the factor, and a written argument referencing the SoP factor number and the dictionary definitions. The decision-maker will then assess whether a reasonable hypothesis is raised. If it is, the claim proceeds to the standard of proof stage.

For decision-makers and advocates, compliance is about correctly identifying the subtype and applying the correct factor list. A checklist approach is recommended. Given the rigid thresholds and definitions, any error in classification can be fatal. The instrument provides no discretion to relax the quantitative requirements, so accurate documentation from the claimant is critical.