Statement of Principles concerning immersion pulmonary oedema (Balance of Probabilities) (No. 35 of 2017)

The core legal and medical concepts in this instrument are immersion pulmonary oedema, death from immersion pulmonary oedema, relevant service, the factors required to establish connection with service, and the interplay with other Statements of Principles.

Immersion pulmonary oedema is defined in operative terms. The instrument states that immersion pulmonary oedema is a condition in which acute pulmonary oedema develops while swimming or diving (s6(2)(a)). The definition also expressly excludes acute pulmonary oedema attributed to pulmonary decompression sickness, acute myocardial infarction or an acute exacerbation of chronic heart failure (s6(2)(b)). The text adds a clinical note describing typical presentation: breathlessness, cough, haemoptysis, pink frothy sputum and hypoxaemia. The SoP also treats death from immersion pulmonary oedema as including death from a terminal event or condition that was contributed to by the person’s immersion pulmonary oedema (s6(3)). The Schedule provides a definition of terminal event, listing pneumonia, respiratory failure, cardiac arrest, circulatory failure and cessation of brain function (Schedule 1).

Relevant service is defined in the Schedule. It covers three categories: 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, and peacetime service under the MRCA (Schedule 1). The instrument applies only to claims to which s120B of the VEA or s339 of the MRCA apply (s4). The title and s7 indicate that the standard of proof for establishing the causal connection is the balance of probabilities; the Authority states its view that it is more probable than not that immersion pulmonary oedema and death from it can be related to relevant service (s7).

Section 8 sets out the two discrete factual factors, at least one of which must be present. Factor 1 is undertaking swimming or underwater diving at the time of clinical onset of immersion pulmonary oedema (s8(1)). Factor 2 is inability to obtain appropriate clinical management for immersion pulmonary oedema (s8(2)). Section 9 requires that any factor in s8 be related to the person’s relevant service (s9(1)). Section 9(2) narrows the application of the inability-to-obtain-management factor so that it applies only to material contribution to, or aggravation of, immersion pulmonary oedema where the person’s immersion pulmonary oedema was suffered or contracted before or during (but did not arise out of) the person’s relevant service.

Section 10 sets an interaction rule with other SoPs: where a factor in this SoP refers to an injury or disease that is covered by another SoP, the factors in that other SoP apply according to that other SoP as in force from time to time (s10(1)-(2)). This creates a formal mechanism for cross‑application where causal reasoning for a related disease is governed elsewhere.

Notes contained in the text are clearly marked as notes. The Schedule is integral for definitions, including immersion pulmonary oedema and the statutory terms MRCA, VEA and terminal event.

The instrument affects three broad groups by design: claimants (persons asserting a link between immersion pulmonary oedema and their relevant service), medical and administrative decision-makers in the veteran and defence compensation systems, and indirectly government agencies that administer benefits under the VEA and MRCA.

Claimants. The SoP applies to individuals making claims that fall under section 120B of the VEA or section 339 of the MRCA (s4). The Schedule defines the types of relevant service that bring a person within scope: 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; and peacetime service under the MRCA (Schedule 1). A claimant who alleges immersion pulmonary oedema as an injury, disease or contributory cause of death will be assessed against the factors in s8 and the service relationship in s9. If at least one of the factors in s8 is present and related to relevant service, a decision-maker may accept the causal connection on the balance of probabilities (s8, s9, s7).

Medical and administrative decision-makers. The Repatriation Medical Authority is the instrument-maker and expresses medical-scientific views in the SoP (s3, s7). The SoP is a guidance instrument for decision-makers who determine entitlement under the VEA and MRCA; it prescribes the factual and medical criteria that the Authority regards as sufficient for causal connection. Those decision-makers must apply the SoP’s definitions and factors when deciding claims that invoke immersion pulmonary oedema. Section 10 creates an obligation to consult other SoPs where a factor refers to a disease already governed elsewhere; this allocates decision-making authority between instruments.

Government agencies. Although the SoP does not itself authorise payments, it directly affects administrative outcomes within schemes administered under the VEA and MRCA by framing what constitutes service-related immersion pulmonary oedema. Agencies that administer compensation and rehabilitation benefits will use the SoP as a determinative input when assessing causation. The SoP thereby affects eligibility for statutory benefits, and consequently affects government expenditure and administrative workloads, because it influences which claims are accepted or rejected. The text itself does not set payment rules, but by specifying causation criteria it changes the operational standard applied to claims.

Excluded groups. The definition of immersion pulmonary oedema excludes acute pulmonary oedema attributed to pulmonary decompression sickness, acute myocardial infarction or an acute exacerbation of chronic heart failure (s6(2)(b)). Also, the definition of relevant service excludes operational service, hazardous service and British nuclear test defence service in the specified categories (Schedule 1). Persons who claim under those excluded service categories or whose pulmonary oedema is attributed to the excluded causes will not have their causation assessed under this SoP.

The instrument does not create new statutory duties in the criminal or regulatory sense. Its operative effect is to define the criteria that must be present for a decision-maker to conclude, on the balance of probabilities, that immersion pulmonary oedema or death from it is connected with a person’s relevant service. The key legal “duties” are therefore duties of assessment that fall on decision-makers administering claims under the VEA and MRCA. These are implicit duties to apply the SoP when determining causation for immersion pulmonary oedema because the instrument is made under s196B(3) of the VEA and the instrument is declared to apply to claims under s120B of the VEA and s339 of the MRCA (s3-s4).

Rights of claimants. Claimants have the right to have their claims considered against the test set out in the instrument. Practically, this means that if a claimant can establish at least one of the s8 factors and that the factor is related to the claimant’s relevant service (s9(1)), then the causation element of their claim may be accepted on the balance of probabilities (s7, s8). Where death is involved, the SoP allows for death to be considered attributable to immersion pulmonary oedema if the immersion pulmonary oedema contributed to a terminal event defined in the Schedule (s6(3); Schedule 1).

Duties of decision-makers and medical assessors. Decision-makers must apply the definitions and factors that the Authority has set out. Section 10 imposes an application rule: if a factor in this SoP refers to an injury or disease already covered by another SoP, then the factors in that other SoP apply as in force from time to time (s10). That requires the decision-maker to locate and apply other relevant SoPs when cross‑referenced conditions are at issue.

Evidential implications. The instrument prescribes which facts must exist to establish causal connection. This creates an evidential duty on claimants to present material that demonstrates the existence and service-relationship of the factors in s8, and on decision-makers to examine those elements. The instrument itself does not specify the form or quantum of evidence required beyond the balance of probabilities standard noted in the title and s7. The Authority states in s7 that, on the medical‑scientific evidence available, it is of the view that it is more probable than not that immersion pulmonary oedema and death from it can be related to relevant service. That is a statement about the standard of proof to be used when applying the SoP.

Limitations and exclusions as rights constraints. The Schedule’s definition of relevant service and s6(2)(b)’s exclusions restrict the set of claims that can be established under this SoP. Those restrictions function as rights constraints: a claimant whose condition falls within one of the exclusions or whose service type is not within the Schedule cannot rely on this SoP to establish causation for their claim.

Administrative discretion and duties. The instrument itself does not specify procedural obligations such as timelines for decision-makers, nor does it list review rights or appeal mechanisms. Those procedural duties remain governed by the underlying statutes and administrative law, not by this SoP. The SoP’s operative role is limited to factual causation; it neither creates nor displaces statutory procedural rights.

This Statement of Principles is a medical‑causal instrument; it does not prescribe criminal penalties, civil sanctions or regulatory fines. The text does not include any penalty provisions, enforcement mechanisms, or administrative sanction regimes. Its legal effect is internal to the adjudicative process that decides claims under the VEA and MRCA: it supplies the causal criteria that decision-makers use when determining whether immersion pulmonary oedema or death from immersion pulmonary oedema is connected with relevant service.

Enforcement in the ordinary sense therefore occurs only through administrative application. Decision-makers who administer benefits under the VEA and MRCA will use the SoP to accept or reject causation arguments in claims. Acceptance under the SoP is an evidentiary threshold for entitlement; rejection may lead to denial of benefits, and denial can trigger statutory review or appeal processes under the VEA and MRCA. The SoP itself does not create those review or appeal pathways; they remain those provided by the underlying statutes.

Responsibility for correct application. The instrument establishes standards for causation that must be applied by adjudicators and medical reviewers. Failure to apply the SoP properly may be challengeable in the statutory review and appeals processes available under the VEA and MRCA, but the instrument contains no enforcement clause or administrative sanction for misapplication. The Schedule and operative sections impose definitional and interpretive duties on decision-makers; these are legally binding as the Authority’s Statement of Principles but procedural remedies for misapplication must be sought under the enabling statutes or administrative law.

Evidence and record-keeping. The SoP indirectly creates an administrative enforcement pressure because claimants and adjudicators will need to document and assess the factors in s8 and their relationship to service per s9. A failure to document relevant facts may lead to an adverse decision. Again, the instrument does not set record-keeping requirements, but its operative role makes adequate evidentiary record-keeping a practical necessity for adjudicators and claimants alike.

No express retroactivity or penalty. The instrument commences on 22 May 2017 (s2). The instrument contains no provision for retrospective penalties or adjustment of past decisions. The SoP functions prospectively from its commencement for claims within the scope of s4, subject to the operation of the underlying statutes.

This instrument is made under the VEA and operates in the statutory ecosystem of veteran and defence compensation law. It expressly cites the legislative power under subsection 196B(3) of the Veterans' Entitlements Act 1986 as its authority (s3). It applies to claims covered by s120B of the VEA or s339 of the MRCA (s4). The Schedule defines the statutory terms MRCA and VEA and identifies the specific categories of service that constitute relevant service for the SoP’s purposes (Schedule 1).

Section 10 establishes an explicit interaction rule with other Statements of Principles. Where a factor in this SoP refers to an injury or disease governed by another SoP, the factors in that other SoP apply as they stand from time to time (s10(1)-(2)). This creates a hierarchy of causal instruments in which cross-referenced conditions are decided by their own applicable SoPs. Decision-makers must therefore consult the current text of other SoPs when a cross-referenced disease or injury is relevant to a factor in this instrument.

The SoP does not alter or displace the procedural provisions, rights, or remedies set out in the VEA or the MRCA. It is confined to causation assessment. Issues such as eligibility criteria beyond causation, calculation of benefits, administrative review rights, appeals, and penalties for false statements remain governed by the underlying statutes and implementing regulations. The instrument’s text contains no procedural or enforcement provisions; it is a medical determination instrument rather than an omnibus statutory amendment.

Exclusions and overlaps. The instrument explicitly excludes certain causes of acute pulmonary oedema from the definition of immersion pulmonary oedema, including pulmonary decompression sickness and acute myocardial infarction (s6(2)(b)). Where such excluded causes are in dispute, decision-makers will not evaluate causation under this SoP. If another SoP covers a condition that overlaps,such as decompression sickness or cardiac conditions,the interaction provision in s10 means the other SoP’s factors must be applied.

Standard of proof and statutory context. The SoP adopts the balance of probabilities standard in its title and frames its view in s7 that on the sound medical‑scientific evidence available it is more probable than not that immersion pulmonary oedema and death from it can be related to relevant service. The underlying statutory claims processes will apply their own legal standards, but the SoP supplies the Authority's considered medical view of how causation should be established under the balance of probabilities test used in administrative claims.

No stated conflict resolution clause. The instrument does not supply detailed conflict resolution rules where its factors might give rise to inconsistent outcomes with other statutory provisions. Rather, it relies on the built-in cross-referencing mechanism in s10 and on adjudicators to apply the appropriate SoP in each case.

The instrument as presented records its initial making and commencement details: it was determined by the Repatriation Medical Authority, dated 21 April 2017, and commenced on 22 May 2017 (see the signature block, s1 and s2). The text does not include any schedules or sections describing amendments made after commencement. There is no amendment log, no "as amended" history, and no transitional or savings provisions appearing in the body of the instrument.

Because the instrument is made under subsection 196B(3) of the VEA, any future amendments would be a matter for the Repatriation Medical Authority to make under that statutory power. Section 10 contemplates that other Statements of Principles may be applied as they stand from time to time; that phrasing implies the instrument is intended to operate in a mutable statutory environment in which SoPs may be varied. The present text, however, contains no record of subsequent variation.

Practically, users should treat the version at hand as the original SoP No. 35 of 2017. In administrative practice, the operative rules and cross‑application in s10 mean that changes to other SoPs could affect the way this SoP operates in particular cases, because s10 requires application of other SoPs "as in force from time to time" where cross-references occur. That means the practical legal effect of this instrument can change without any amendment to this document itself, to the extent that other linked SoPs are altered.

The instrument does not supply any retroactivity clause, nor does it purport to alter past determinations. Its commencement date is explicit (s2). Where claimants seek to rely on earlier or later SoPs, the underlying statutes and agency practice will determine which version applies; the instrument’s own text does not elaborate on transition rules.

For auditing or historical purposes, the instrument itself provides only the date of determination and commencement. Any further amendment history must therefore be sought from the Repatriation Medical Authority's records or consolidated statutory compilations, because no amendment history appears within the instrument text provided.

The text of the Statement of Principles contains no references to litigation, case law, judicial interpretations, tribunal decisions, or disputes involving this instrument. It records the Repatriation Medical Authority’s medical‑scientific view and sets out the factors for causal connection, but it does not document any litigation history or judicial consideration.

Absent internal references to litigation, the instrument’s legal status is that of an evidentiary and medical criterion instrument intended for use by decision-makers under the VEA and MRCA. Any challenges to administrative decisions that apply this SoP would proceed under the statutory review and appeal mechanisms applicable to those schemes; those procedural avenues are not described in this instrument. The instrument itself provides no analysis of how courts or tribunals have treated its provisions.

Because the instrument is silent on litigation, two practical implications follow. First, users seeking guidance on how tribunals or courts have interpreted or applied this SoP must consult external jurisprudence and consolidated records, since no such material is contained in the instrument. Second, the absence of litigation references means the Authority has promulgated a medical view without embedding comment on contested application or settled judicial responses.

For decision‑makers and practitioners, this silence in the instrument itself does not prevent litigation from occurring. It simply means that any reported judicial consideration would need to be identified and analysed outside the instrument. The instrument does not purport to be binding precedent in the judicial sense; it is the Authority’s statement intended for administrative application.

Several drafting features and limits in the instrument are likely to be the source of practical traps for claimants, medical advisers and decision-makers. These are matters of scope, exclusion, evidential focus and application timing.

Narrow operative definition of immersion pulmonary oedema. The instrument defines immersion pulmonary oedema as acute pulmonary oedema developing while swimming or diving (s6(2)(a)). The operative words "while swimming or diving" are literal: the factor in s8(1) repeats "undertaking swimming or underwater diving at the time of the clinical onset". Cases where pulmonary oedema develops outside those specific activities, or where onset timing is unclear, will be difficult to fit within factor 1. Practitioners must not assume broader contexts such as general immersion, grooming near water, or land-based exertion constitute "swimming or diving" absent medical and factual proof.

Express exclusions. The definition excludes acute pulmonary oedema attributed to pulmonary decompression sickness, acute myocardial infarction or an acute exacerbation of chronic heart failure (s6(2)(b)). That means that when pulmonary oedema is plausibly caused by one of those excluded reasons, this SoP is not the correct instrument to establish causation. Cross‑reference risk exists: if a claimant’s presentation could be attributed to decompression sickness or acute MI, the decision-maker must determine which causal theory is primary and whether another SoP governs.

Factor 2’s conditional application. "Inability to obtain appropriate clinical management for immersion pulmonary oedema" is a standalone factor (s8(2)), but s9(2) narrows it. The inability-to-treat factor applies only to material contribution to, or aggravation of, immersion pulmonary oedema where the person's immersion pulmonary oedema was suffered or contracted before or during (but did not arise out of) the person's relevant service. That is a complex temporal constraint: the factor is not a broad safety-net for treatment failures occurring during service. It applies only in situations where the underlying immersion pulmonary oedema pre-dated or was contracted before/during service but did not arise out of it, and the inability to obtain management materially contributed or aggravated the condition. Misreading s8(2) as a blanket remedy for all treatment failures will lead to error.

Relationship to relevant service required. Section 9(1) makes explicit that any factor in s8 must be related to the person’s relevant service. That is not automatic. Even where a claimant was swimming or diving, the decision-maker must still be satisfied that the swimming or diving was related to the claimant’s relevant service. For example, recreational swimming unrelated to service activities may not satisfy the requirement. This introduces a fact-sensitive inquiry into whether the conduct or circumstances were connected to the defined types of relevant service in the Schedule.

Death and terminal events. The instrument treats death from immersion pulmonary oedema as including death from a terminal event or condition contributed to by immersion pulmonary oedema (s6(3)). The Schedule lists several terminal events (pneumonia, respiratory failure, cardiac arrest, circulatory failure, cessation of brain function). Causation for death therefore may be indirect and will require tracing contribution to these terminal events. Poorly documented chains of causation from immersion pulmonary oedema to terminal events will risk rejection.

Cross-SoP application. Section 10 requires application of other SoPs where a factor refers to an injury or disease covered by another SoP. Practitioners must therefore actively search for and apply the current text of other SoPs. Failure to consult cross-referenced instruments may produce inconsistent or incorrect determinations.

Notes do not alter operative text. The instrument contains clinical notes descriptive of typical presentation. Those notes are not operative provisions. Analysts must not treat notes as definitions or expand their legal reach beyond the statutory wording. The Schedule contains the definitive definitions.

Balance of probabilities standard. The instrument is explicitly framed on the balance of probabilities (title and s7). Decision-makers and practitioners must apply that standard. However, the SoP does not set evidentiary rules or make presumptions; successful application still depends on meeting the factual elements in s8 and their relationship to service under s9.

No procedural guidance. The instrument sets causal criteria but offers no procedural or evidentiary details such as what constitutes "appropriate clinical management" or how to prove "inability to obtain" it. Those terms will require case-by-case medical and factual assessment, and absent clear statutory definitions they may be contested in claims.

Compliance in this context is about structuring claims and administrative assessments so that the causal elements the Repatriation Medical Authority prescribes are properly established and documented. The instrument identifies two primary factual pathways to causation and sets definitional gates. Practically, parties should organise evidence and adjudicative steps to address each relevant subsection.

1. Confirm the claim falls within the instrument’s scope. Ensure the claim is one to which s120B of the VEA or s339 of the MRCA applies (s4). Confirm the claimant’s kind of service falls within the Schedule’s definition of relevant service: eligible war service (other than operational service), defence service (other than hazardous service and British nuclear test defence service) under the VEA, or peacetime service under the MRCA (Schedule 1). If these thresholds are not met, this SoP is not the applicable instrument.

2. Establish the medical condition within the operative definition. Demonstrate that the condition is immersion pulmonary oedema as defined: acute pulmonary oedema developing while swimming or diving (s6(2)(a)). Exclude alternative causes named in s6(2)(b). Medical records should document clinical onset timing and the absence of alternative attributions such as decompression sickness, acute myocardial infarction or acute exacerbation of chronic heart failure. The clinical note in s6(2) describing typical presentation may inform assessment but is not a substitute for documented diagnosis.

3. Prove at least one of the s8 factors. For factor 1, supply contemporaneous or retrospective evidence that the clinical onset occurred while the person was undertaking swimming or underwater diving (s8(1)). For factor 2, supply evidence of the claimant’s inability to obtain appropriate clinical management, such as records showing efforts to obtain treatment, documented avoidance or absence of care, and an expert medical opinion that lack of management materially contributed to or aggravated the condition (s8(2)). Remember that s9(2) narrows factor 2: it applies only where the immersion pulmonary oedema was suffered or contracted before or during, but did not arise out of, the person’s relevant service, and where inability to obtain management materially contributed to or aggravated the condition. Claims relying on factor 2 must therefore address that temporal and causal structure.

4. Demonstrate relationship to relevant service. For any factor relied upon under s8, the claimant must show that the factor is related to the claimant’s relevant service (s9(1)). Evidence may include service records, duty rosters, training logs, travel orders, or sworn statements linking the swim or dive activity to service duties, training, or conditions arising from the relevant service. For recreational or incidental activities, provide the factual link showing the activity related to service where possible.

5. For death cases, trace causation to terminal events. If asserting death from immersion pulmonary oedema, document the chain from immersion pulmonary oedema to the terminal event listed in Schedule 1. Medical records, autopsy reports, and expert opinions tying the immersion pulmonary oedema as a contributor to the terminal event will be necessary (s6(3); Schedule 1).

6. Address exclusions and cross-references. If the presenting clinical picture could be due to an excluded cause in s6(2)(b) or to conditions governed by another SoP, obtain relevant medical opinions and consult the other SoP(s) as required by s10. Where a factor refers to an injury or disease that is the subject of another SoP, apply the factors from that other SoP "as in force from time to time" (s10). Practitioners should therefore identify any cross-referenced SoPs early.

7. Use balanced probative medical evidence. The Authority frames the test in medical‑scientific terms and under the balance of probabilities standard (s7). Expert medical evidence should address the causal nexus in medical terms and tie clinical findings to the factual history. Experts should state opinions on whether the s8 factors are met and whether those factors are related to relevant service under s9. Where disagreement or ambiguity exists on causation or onset timing, obtain further medical reports to support whichever factor is relied upon.

8. Document treatment attempts and barriers. For claims invoking inability to obtain appropriate clinical management, document attempts to access treatment, refusals, lack of facilities, geographic barriers, or administrative obstacles. Evidence should also link the failure to obtain care to a material contribution or aggravation of the condition as required by s9(2).

9. Prepare to show contemporaneity. The instrument’s emphasis on the timing of clinical onset during swimming or diving means that establishing temporal specificity will be important. Where contemporaneous medical notes are unavailable, credible witness statements, service logs, or operational reports that can corroborate timing and activity at the time of onset will strengthen a claim.

10. Check for cross-disciplinary expertise. Because the instrument requires medical-scientific analysis, involve clinicians who can opine on pulmonary and diving medicine where relevant. Where cardiac conditions are in issue, ensure that opinions address the s6(2)(b) exclusion for acute myocardial infarction and the role of chronic heart failure exacerbations.

11. Maintain procedural awareness. The SoP itself does not define administrative process. Follow the procedural and evidentiary rules of the underlying statutes when lodging claims, and ensure timeliness, appropriate statutory forms and adherence to review or appeal pathways if decisions are adverse.

12. Audit for other SoPs. Before finalising a claim, search for other Statements of Principles that might cover overlapping conditions referred to in s10. Because s10 requires application of other SoPs where relevant, failure to do a cross-SoP check risks an incomplete submission.

Applying these steps will align claim submissions and administrative assessments with the specific causal criteria the Repatriation Medical Authority has prescribed. The instrument sets narrow factual gates; meeting them requires clear, documented evidence addressing onset timing, treatment access, medical causation and the nexus to relevant service.