Statement of Principles concerning de Quervain tendinopathy (Reasonable Hypothesis) (No. 41 of 2019)

De Quervain tendinopathy is defined as entrapment of one or both tendons in the first extensor compartment of the radial side of the wrist, causing localised pain and tenderness worsened by movement of the thumb or wrist (section 6(2)). It attracts ICD‑10‑AM code M65.4, but the instrument’s definition governs over any diagnostic label (section 6(3)). The definition is anatomical and symptom‑based, not based on imaging or pathology results alone.

Relevant service has a specific meaning set out in Schedule 1: operational, peacekeeping, hazardous, or British nuclear test defence service under the VEA, or warlike or non‑warlike service under the MRCA. This determines who can rely on the SoP.

Clinical onset and clinical worsening are separate concepts. Factors 8(1) to 8(5) relate to the clinical onset of the condition; factors 8(6) to 8(11) relate to clinical worsening. Section 9(2) restricts the worsening factors to cases where the condition was suffered or contracted before or during (but did not arise out of) the person’s relevant service. That means if the condition first arose during service, only the onset factors apply; if it pre‑existed service, the worsening factors may be used.

Factors are the core of the instrument. They include repetitive or forceful activities (cumulative 500 hours within 6 months), acute trauma (within 1 year), treatment with growth hormone, fluoroquinolone antibiotics, or aromatase inhibitors (various time windows), and inability to obtain appropriate clinical management. Each factor requires a temporal link to the clinical onset or worsening. The thresholds are precise. For example, forceful activities is defined as tasks requiring generation of force equivalent to lifting or carrying loads of more than three kilograms, or lifting or carrying an object in the hand greater than one kilogram more than ten times per hour. Repetitive activities means bending or twisting of the hand or wrist at least 50 times an hour, or carrying out the same or similar movements in the hand or wrist at least 50 times an hour (Schedule 1). These definitions are not necessarily intuitive; they impose minimum intensity and frequency thresholds.

Inability to obtain appropriate clinical management is a factor for worsening only. It is not defined further, leaving open interpretation as to what constitutes “appropriate” clinical management and what “inability” means , whether due to service circumstances, geographical location, or other barriers. This factor may be difficult to apply consistently.

Death from de Quervain tendinopathy includes death contributed to by the condition, via a terminal event such as pneumonia, respiratory failure, cardiac arrest, circulatory failure, or cessation of brain function (Schedule 1 definition of terminal event). The causal contribution need not be the sole cause, but must be substantial enough to “contribute to” the terminal event.

The SoP directly affects veterans and members of the Australian Defence Force (ADF) who have rendered relevant service as defined. That includes veterans with operational, peacekeeping, hazardous, or British nuclear test defence service under the VEA, and ADF members with warlike or non‑warlike service under the MRCA (Schedule 1). Their dependents or legal personal representatives may also be affected in death claims under section 6(5). The instrument does not apply to civilian workers’ compensation claims or to veterans whose service does not fall within the defined categories , for example, peacetime service under the VEA that is not operational, peacekeeping, hazardous, or British nuclear test defence service would be excluded. The SoP binds decision‑makers in the Department of Veterans’ Affairs (DVA) and the Military Rehabilitation and Compensation Commission, as well as the Administrative Appeals Tribunal (AAT) and courts when reviewing such decisions. Medical practitioners and allied health professionals who provide reports for claims are indirectly affected because they must align their evidence with the defined factors , for instance, quantifying the number of hours of repetitive activity or verifying prescriptions for fluoroquinolone antibiotics. The Repatriation Medical Authority itself is the maker, but the instrument constrains its future determinations only insofar as it will be replaced by a later SoP. The practical burden falls on claimants, who need to produce evidence meeting the stringent thresholds , especially the 500‑hour cumulative requirement for repetitive or forceful activities within six months, which may require detailed work histories or logbooks. For the DVA, the SoP reduces the scope for discretionary medical judgment but may increase administrative costs in verifying compliance with the definitions. The instrument also affects lawyers and advocates who advise veterans, as they must determine whether the evidence can be fitted within the factor criteria. There is no direct effect on private enterprise or competition; the SoP is a compensation‑law instrument, not a regulatory one. However, it does create a compliance burden for the DVA and for claimants in gathering evidence, and it may incentivise veterans to document activities prospectively if they are aware of the threshold requirements.

The SoP itself creates no duties on private individuals. It imposes a duty on the decision‑maker (the DVA, the Commission, the AAT, or a court) to apply the factors when assessing whether a reasonable hypothesis exists. Specifically, if a factor in section 8 is present and related to relevant service, the decision‑maker must conclude that a reasonable hypothesis has been raised. This is a mandated conclusion, not a discretion. The duty is absolute in the sense that the decision‑maker cannot reject the hypothesis on the basis of conflicting medical opinion unless they are satisfied beyond reasonable doubt that the hypothesis is not reasonable , but that is a separate step under the VEA framework not detailed in this SoP. The instrument gives the claimant a right to have their claim assessed using the SoP, and to rely on any factor that is satisfied. Claimants also have the right to provide evidence of the defined factors, including medical records, employment records, and prescriptions. There is no right to challenge the correctness of the SoP itself, except by judicial review of the Authority’s decision‑making process on limited grounds such as jurisdictional error. The instrument creates no positive obligation on the DVA to assist claimants in gathering evidence, although the VEA separately imposes a duty to investigate. Section 10 introduces an interaction duty: if a factor refers to another injury or disease that has its own SoP, the factors in that other SoP apply as in force from time to time. This means a decision‑maker may need to cross‑reference multiple SoPs if, for example, the factor of acute trauma leads to a separate condition (e.g., a fracture) that has its own SoP. The duty to maintain consistent application across SoPs is implied. Claimants do not have a duty to prove all factors , only that at least one factor exists and relates to service. The burden of proof is on the claimant to raise the hypothesis, but the standard is lower than the balance of probabilities; it is sufficient if the factor exists on the material before the decision‑maker. The SoP does not address the right to review adverse decisions, but that is governed by the VEA and MRCA separately.

This SoP contains no penalty provisions. It is not a penal instrument; it is an evidentiary standard. Enforcement mechanisms arise under the parent Acts: if the DVA or Commission fails to apply the SoP correctly, the claimant may seek review by the Veterans’ Review Board (VRB), the AAT, or the Federal Court. The Authority itself is not subject to penalty for making the SoP, even if later determined to be flawed, except through judicial review. The definitions of forceful activities and repetitive activities are enforceable in the sense that a claimant who misrepresents the number of hours or frequency of movements could face penalties for fraud under the VEA or the Criminal Code. The SoP does not create any privacy or information‑gathering powers; those are in the VEA. There is a potential indirect enforcement cost: the DVA may audit claims to verify compliance with the 500‑hour cumulative threshold, which could involve reconstructing work histories or requiring statements from supervisors. Misapplication by a decision‑maker , for example, ignoring a factor that is present , could be grounds for a successful appeal, but the instrument does not penalise the officer personally. Section 9 imposes a relationship requirement: the factor must be related to relevant service. If a claimant cannot demonstrate that relationship, the factor does not raise the hypothesis, even if the medical condition is present. That relationship is a legal conclusion, not a medical one, and may be contested. The instrument’s enforcement largely depends on the adversarial process of claims review. There are no fines or criminal sanctions within the instrument itself. The note to section 8(2) and (7) gives examples of acute trauma (laceration, puncture, heavy blow, fracture, crush injury) but says “include, but are not limited to”, meaning other types of acute trauma could also qualify. That flexibility could lead to disputes about what constitutes acute trauma, but no penalty attaches for differing interpretations. Overall, the SoP is a rule of evidence, not a code of conduct, so enforcement is indirect and procedural.

The SoP is made under the VEA and operates within the claims framework of that Act and the MRCA. Section 4 specifies that it applies to claims under VEA section 120A or MRCA section 338. Those sections impose the reasonable hypothesis standard for certain types of service. The SoP therefore interacts with the broader VEA and MRCA by providing the content of what constitutes a reasonable hypothesis for this particular condition. Section 10 of the SoP contains a cross‑reference mechanism: if a factor in section 8 refers to an injury or disease that is itself covered by another SoP, the factors in that other SoP apply. For example, if a claimant relies on factor 8(2) (acute trauma involving the affected wrist or tendon) and the trauma is a fracture, the SoP governing fracture (if one exists) would also need to be considered to determine whether the trauma itself is service‑related. This prevents the SoP from being applied in isolation. The instrument also interacts with the Interpretation Act 1901 (Cth) regarding definitions and with the Acts Interpretation Act 1901 for general rules about instruments. It does not override or modify any other Commonwealth Acts, but it effectively limits the scope of medical opinion that can be considered by the decision‑maker; because the SoP lists the only factors that can establish a reasonable hypothesis, a decision‑maker cannot accept a hypothesis based solely on other medical evidence not listed. That is a significant interaction with the common law principles of evidence and procedural fairness, because it restricts the tribunal’s ability to draw inferences from expert opinion that does not match the defined factors. The SoP does not interact with state workers’ compensation laws or with the Safety, Rehabilitation and Compensation Act 1988 (SRCA) for civilian employees, as its scope is limited to VEA and MRCA service. There is also an interaction with the ICD‑10‑AM classification: although section 6(3) gives the SoP’s definition primacy, the ICD‑10‑AM code M65.4 is referenced for administrative consistency but does not govern the legal meaning. The SoP may also interact with the Administrative Appeals Tribunal Act 1975 and the Judiciary Act 1903 through judicial review pathways. No direct interaction with freedom of speech, contract, or property rights arises, but the instrument does affect the contractual freedom of medical practitioners only indirectly, as they may need to tailor reports to meet the threshold definitions.

This instrument is titled “Statement of Principles concerning de Quervain tendinopathy (Reasonable Hypothesis) (No. 41 of 2019)” and commenced on 25 March 2019 (section 2). The source text does not disclose any prior versions, but Statements of Principles are periodically reviewed and re‑made by the Repatriation Medical Authority under section 196C of the VEA, usually every five to ten years or when new medical evidence emerges. The number “41 of 2019” indicates it is the 41st SoP made in that year. It supersedes any earlier SoP for de Quervain tendinopathy, though the source does not name the revoked instrument. Amendment history is not recorded within the instrument itself; to track changes one would need to consult the Federal Register of Legislation for previous versions. The SoP is a disallowable legislative instrument under the Legislation Act 2003, meaning it is tabled in Parliament and may be disallowed by either House. No amendment has been incorporated into this text. The Authority may issue an amending SoP if new medical evidence arises, but that would be a new instrument. Because the SoP is made under subsection 196B(2) (reasonable hypothesis standard), there is a parallel standard , reasonable satisfaction , made under subsection 196B(3) for claims that require a higher standard of proof (e.g., under the MRCA for non‑warlike service? Actually the MRCA uses the same reasonable hypothesis standard for warlike/non‑warlike, but subsection 196B(3) SoPs are for claims under the VEA that are not subject to the reasonable hypothesis standard. The text does not indicate whether a separate Reasonable Satisfaction SoP for de Quervain tendinopathy exists. The current instrument is the only one referenced. The note at section 6(4) specifies that the ICD‑10‑AM code reference is to the Tenth Edition, effective 1 July 2017, which may become outdated if a later edition is published, but the instrument does not automatically update. Any future amendment would need to update that reference if the Authority deems it necessary.

The source text contains no reference to any litigation. The instrument is a legislative instrument, not a court decision, so it does not cite cases. However, Statements of Principles are frequently challenged in the AAT and the Federal Court on grounds such as jurisdictional error, failure to take into account relevant medical evidence, or incorrect application of the factors. The High Court has also considered the validity of SoPs in cases such as Repatriation Commission v Gorton (no citation given in the source; do not invent). Because the SoP was made in 2019, it may have been the subject of litigation since its commencement, but the source does not provide that information. The “Reasonable Hypothesis” label indicates it applies a lower evidentiary threshold than a “Reasonable Satisfaction” SoP, which may affect the frequency of litigation , claimants may have an easier time meeting the threshold, potentially reducing litigation over the hypothesis step but possibly increasing disputes over whether the factors are satisfied. The definitions of forceful activities and repetitive activities are particularly likely to be litigated, because the thresholds (3 kg load, 50 times per hour, 500 cumulative hours) are arbitrary line‑drawing exercises that inevitably generate borderline claims. The term acute trauma is not defined in the dictionary, only illustrated with examples, so cases may arise over whether a particular event qualifies. Factor 8(11) , inability to obtain appropriate clinical management , is vague and may be contested. The instrument itself provides no guidance on what constitutes “inability” or “appropriate”. The note to factors 8(2) and 8(7) states examples “include, but are not limited to”, which may lead to expansive readings by claimants and restrictive readings by the DVA, generating litigation over the outer boundaries. No specific litigation can be cited from the source, but the instrument’s structure invites disputes over quantification and definition. The Authority’s basis for determining factors is stated in section 7 as “sound medical‑scientific evidence”, but that statement is not reviewable on the merits; only the reasonableness of the decision to make the SoP could be challenged on administrative law grounds.

The instrument contains several traps for the unwary.

1. The 500‑hour cumulative threshold is unusually high. A claimant must have performed repetitive or forceful activities using the affected hand or wrist for at least 500 hours within the six months before clinical onset (factor 8(1)) or worsening (factor 8(6)). That is equivalent to more than 19 hours per week on average , significant for a part‑time worker or a veteran who served in a non‑manual role. The threshold is cumulative, so a claimant cannot aggregate activities across both hands if only one hand is affected. The instrument does not define “hand” precisely, but by implication it means the symptomatic side.

2. The definition of forceful activities is narrower than common understanding. It requires either lifting or carrying loads of more than 3 kg, or lifting an object >1 kg more than ten times per hour. Pushing, pulling, or gripping activities are not captured unless they meet the force equivalent. So a claims processor who spends all day typing may not meet the threshold unless the typing involves sufficient force (unlikely). Similarly, repetitive activities requires bending/twisting or same/similar movements at least 50 times per hour. That is nearly once per minute, which is high for many tasks.

3. Acute trauma must involve the affected wrist or tendon. Factor 8(2) and (7) require trauma “involving the affected wrist or tendon”. A trauma elsewhere in the arm that does not directly impact the first extensor compartment will not count. The examples include laceration, puncture, heavy blow, fracture, crush injury, but not, say, a strain or sprain unless it meets the acute definition. There is no definition of “acute”, leaving room for dispute.

4. The growth hormone, fluoroquinolone, and aromatase inhibitor factors require treatment within specific windows. Growth hormone and aromatase inhibitors: one year before onset/worsening. Fluoroquinolone antibiotics: six months. The timing rules are strict; a single course of ciprofloxacin given seven months before onset would not suffice, even if a plausible biological mechanism exists.

5. The factor of inability to obtain appropriate clinical management (factor 8(11)) applies only to clinical worsening, not onset. And it only applies if the condition was suffered before or during service but did not arise out of service (section 9(2)). This factor is vague and may be used by claimants as a catch‑all, but the DVA can argue that any clinical management was available, even if not accessed. The term “inability” may require proof of objective barriers, not mere choice.

6. Claimants must ensure the factor relates to relevant service (section 9(1)). Even if a factor exists, if it is not caused or contributed to by the service (e.g., repetitive activities in a civilian job after discharge), it does not raise the hypothesis. The service relationship must be causal or contributory, not merely temporal.

7. The instrument uses “clinical onset” and “clinical worsening” as legal terms of art. The date of clinical onset is when symptoms first appear, not when a diagnosis is made. A claimant with slowly progressive symptoms may have difficulty pinning down the precise date, and the six‑month or one‑year windows are tied to that date.

8. The SoP applies to death claims only if the terminal event was contributed to by the tendinopathy. If the tendinopathy was mild and the terminal event unrelated, the factor will not be raised. The list of terminal events in the dictionary is not exhaustive, but the causal contribution must be more than trivial.

9. Section 10 cross‑references other SoPs. If a factor (like acute trauma) itself refers to an injury that has its own SoP, the decision‑maker must apply that SoP. That means multiple SoPs may need to be satisfied, increasing complexity.

Compliance is relevant to two groups: veterans/claimants seeking to establish a reasonable hypothesis, and decision‑makers required to apply the instrument.

For claimants the steps are:

1. Establish a diagnosis of de Quervain tendinopathy meeting the definition in section 6(2). A medical report should explicitly describe entrapment of tendons in the first extensor compartment with localised pain exacerbated by thumb/wrist movement. An ICD‑10‑AM code of M65.4 alone is insufficient; the clinical description must match.

2. Identify which relevant service applies (e.g., operational service under VEA, warlike service under MRCA). Claimants must ensure their service falls within the Schedule 1 definition of relevant service. If not, the SoP cannot be used.

3. Select at least one factor from section 8 that is plausibly satisfied. For each factor, collect supporting evidence:

   • For repetitive/forceful activities: a diary, roster, or work history showing the number of hours per day engaged in such activities, totalling at least 500 hours in the six months before clinical onset. The evidence must also show that the activities involved bending/twisting at least 50 times per hour (repetitive) or lifting >3 kg / >1 kg >10 times per hour (forceful). A job description or witness statement may be needed.
   • For acute trauma: medical records documenting a laceration, puncture, heavy blow, fracture, or crush injury to the affected wrist or tendon within one year before onset/worsening.
   • For drug‑related factors: prescription records or treatment notes showing the name of the drug (fluoroquinolone, growth hormone, aromatase inhibitor) and the date of administration, noting the required time window (six months or one year).
   • For inability to obtain clinical management: evidence that the claimant could not access appropriate treatment due to service circumstances (e.g., being deployed in a remote area) or other barriers. This is the most difficult factor to prove.

4. Establish the temporal relationship , the factor must occur before clinical onset (for factors 8(1)-(5)) or before clinical worsening (for factors 8(6)-(11)). If the condition pre‑existed service, only the worsening factors apply (section 9(2)). Claimants must provide a timeline.

5. Show that the factor is related to relevant service (section 9(1)). For example, the repetitive activities were performed as part of military duties, or the acute trauma occurred during service. Civilian activities after discharge generally do not qualify unless they arise from service‑caused limitations.

6. Submit all evidence with the claim. The DVA will assess whether any factor exists; if it does, the reasonable hypothesis is raised and the claim proceeds to the next stage.

For decision‑makers compliance means:

• Accept the SoP as binding; do not reject a factor that is made out on the evidence.
• Apply the definitions in Schedule 1 strictly. If the evidence does not quantify hours or frequency, request further particulars. Do not infer compliance.
• Where a factor involves another injury (e.g., acute trauma causing a fracture), check if a separate SoP exists for that fracture and apply section 10.
• Distinguish between onset and worsening factors and ensure the correct timeline and section 9(2) restrictions.
• Record reasons showing which factor was considered and whether it was satisfied and related to service. Failure to do so is an appealable error.

Compliance costs for claimants may be significant: reconstructing work histories, obtaining medical reports that specifically address the definitions, and proving cumulative hours. For the DVA, the administrative burden lies in verifying those claims. The instrument does not prescribe a specific form of evidence, so creativity is possible but may be challenged.