The instrument is compact and technical. Its main concepts are defined in the instrument itself (s 4) and operate by substituting elements of two existing formulae in the Regulations: the actual return formula (subregulation 9AB.12(2) of the Regulations) and the benchmark return formula (subregulation 9AB.14(2) of the Regulations). The core concepts to track are:

• Lifecycle Part 6A product: referenced to the meaning given in regulation 9AB.3 of the Regulations; this instrument only applies where the product is both a lifecycle Part 6A product and a MySuper product (s 5).

• Change of lifestage: a defined occurrence that requires two identified quarterly end points. The definition requires that the product has particular lifestages at the end of a quarter in a lookback period and different lifestages at the end of the immediately following quarter (s 4, definition of “change of lifestage”, and the Note that a later quarter must immediately follow the earlier quarter). The lookback period has the meaning in regulation 9AB.6 of the Regulations (s 4).

• Change event and Day X: a “change event” is the date of a change of lifestage, but expressly excludes change events that are solely the deletion of an older-cohort lifestage due to insufficient members or creation of a lifestage to cater for a younger cohort (s 4). “Day X” is defined as the day prior to the change event (s 4), and functions as the partition point within the quarter for the substitute lifestage-weight calculations (ss 7(2), 8(2)).

• Lifestage weight substitution: for the quarter during which a change event occurs, the definition of “lifestage weight” in subregulation 9AB.4(1) of the Regulations is replaced by a two-segment definition. For the part of the quarter before Day X, the numerator and denominator use market values at the end of the previous quarter; for the part from the change event to the end of the quarter they use market values at the end of the current quarter (ss 7(2), 8(2)).

• SAA parameter substitution: in the benchmark formula, for the part of a quarter from change event to end of quarter, “SAAa,j,t-1” is replaced with “SAAa,j,t” (s 8(3)). This changes which assumed strategic allocation applies for that subperiod.

• Index interpolation for unlisted asset classes: where an assumed index value is not available on Day X for a covered asset class described with ‘unlisted’ in the subregulation 9AB.17(7) table, the instrument requires linear interpolation using the index values immediately before and after Day X to derive an index value to use in the benchmark formula (s 8(5)).

These definitions and substitutions are narrowly framed. The instrument does not impose a permanent redefinition of lifestage weight; it modifies the relevant formulae only for the quarter during which the change event occurs (s 6). The Notes in s 4 clarify that a lifecycle product may undergo one or more changes of lifestage during a lookback period, which implies the instrument’s rules may need to be applied multiple times across different quarters if multiple changes occur (s 4 Note 2).

The instrument’s application is expressly limited. Section 5 provides that it applies only to an RSE licensee of a superannuation entity that offers a Part 6A product that is both a MySuper product and a lifecycle Part 6A product. That formulation identifies three necessary conditions:

• the entity must be an RSE licensee (the regulated superannuation entity licensee responsible for the product);

• the product must be a Part 6A product as defined in section 60B of the Act (the lifecycle regulatory category); and

• the same Part 6A product must be registered or designated as a MySuper product under subsection 10(1) of the Act.

Only RSE licensees meeting those conditions are bound to apply the formula modifications set out in Parts 7 and 8 for the quarter in which a change event occurs (s 6). The instrument does not extend to standard (non-MySuper) Part 6A products, nor to MySuper products that are not Part 6A lifecycle products. It also does not purport to change the underlying scope of what is a lifecycle product or MySuper product; it operates as a technical determination for a specified intersection of product types (s 5).

“Change event” is narrowly defined and excludes two operational circumstances: deletions of a lifestage to cater for older cohorts due to insufficient members, and creation of a lifestage to cater for a younger cohort (s 4). That exclusion removes those operational actions from the set of events that trigger the formula modifications. The instrument therefore affects RSE licensees only when the lifestage composition changes in a way that meets the formal definition of change of lifestage and is not one of the two excluded scenarios.

Data providers, administrators and advisers that support an RSE licensee’s calculations will be indirectly affected. The instrument requires specific market-value inputs at the end of the previous quarter and at the end of the current quarter (s 7(2), s 8(2)), and, for the benchmark, an SAA parameter with a particular time index to be used for the post-change-event subperiod (s 8(3)). Where index values for unlisted covered asset classes are not available on Day X, administrators must derive an index value by linear interpolation using values immediately before and after Day X (s 8(5)). These requirements place precise data-timing and data-source obligations on the entity doing the calculations, whether that is internal actuarial teams, outsourced administrators, or third-party data vendors.

The changes are time-limited in application: they apply only to the quarter during which a change event occurs. An RSE licensee is therefore affected only in quarters where its lifecycle MySuper product undergoes a qualifying change of lifestage within the lookback period used for returns (ss 6-7).

The instrument does not create novel statutory rights or broad duties outside its calculation regime. Its operative content is to require specified substitutions in the way statutory formulae are applied for quarters in which a change event occurs (ss 6-8). That produces a set of concrete obligations for RSE licensees to implement:

• Duty to determine applicability: The RSE licensee must determine whether the instrument applies to a particular product. That requires confirming that the product is a Part 6A product, that it is a MySuper product, and that a change of lifestage has occurred in a lookback period in the sense defined (s 5; s 4 definition of “change of lifestage”).

• Duty to identify and time the change event: The licensee must identify the date of the change event and the corresponding Day X (day prior) because Day X is the partition point for lifestage-weight computation and potential index interpolation (s 4; ss 7(2), 8(2), 8(5)). The instrument defines Day X as the day prior to the change event (s 4).

• Duty to use specified market values for lifestage weights: For the subperiod from the beginning of the quarter to Day X, the licensee must use market values at the end of the previous quarter for numerator and denominator of the lifestage weight. For the subperiod from the change event to the end of the quarter, market values at the end of the current quarter must be used (ss 7(2), 8(2)).

• Duty to substitute SAA variable in benchmark formula: For the part of the quarter from change event to end of quarter, the licensee must apply SAAa,j,t instead of SAAa,j,t-1 in the benchmark return formula (s 8(3)).

• Duty to derive a Day X index for unlisted covered asset classes if not available: If the assumed index for a covered asset class described as ‘unlisted’ in the table in subregulation 9AB.17(7) is not available on Day X, the licensee must derive an index value at Day X by linear interpolation using the immediately available index values before and after Day X (s 8(5)). The derived index value feeds into the index amount and then into the benchmark formula (s 8(5) note).

• Duty to apply these substitutions only for the quarter in which the change event occurs: The instrument explicitly limits the substitution to that quarter (s 6). The original actual and benchmark return formulae continue to apply in other quarters.

The instrument does not itself impose reporting or notification duties, nor does it state procedural rights such as appeal or review of the determination. It also does not in its text confer explicit rights on members or third parties to challenge calculations. The obligations are technical calculation duties that attach to the RSE licensee’s processes for calculating actual and benchmark returns for the specified MySuper lifecycle product.

Because the instrument substitutes components of formulas found in the Regulations, the RSE licensee’s duty is to implement the substituted definitions in place of the existing definitions for the quarter during which a qualifying change event occurs (ss 7-8). The instrument thus places precise computational obligations on those responsible for calculating returns, rather than creating new substantive entitlements that directly alter member benefits or investment policy.

The instrument itself contains no express penalties, compliance enforcement provisions, or administrative sanctioning regime. It is framed as a technical determination that modifies specific formulae in the Regulations (s 3); it does not include a penalty schedule or enforcement procedures. The text does not specify criminal, civil, or administrative penalties for non‑compliance.

Because the instrument is made under the Superannuation Industry (Supervision) Regulations 1994 (s 3), any enforcement or compliance consequences for failing to apply these modifications would arise through the broader regulatory framework established by the Regulations and the Superannuation Industry (Supervision) Act 1993. This instrument does not itself identify or alter those enforcement mechanisms; it simply prescribes how the actual and benchmark return formulae are to be modified in defined circumstances (ss 6-8).

Therefore, from the instrument alone:

• There are no express penalties contained in this instrument for failure to apply the specified formula substitutions.

• The instrument does not set out an enforcement agency, compliance reporting mechanism, or review/appeal process in respect of the determinations it contains.

• Any regulatory consequences of non‑adherence to the instrument’s calculation requirements would depend on the application of the Act and the Regulations, and on the supervisory and enforcement powers exercisable under those statutes and regulations. The instrument cites those regulations as its authority (s 3), but it does not itself state how breaches are to be detected, reported, or sanctioned.

Practically, an RSE licensee that does not implement the specified substitutions when a qualifying change event occurs will not be complying with this technical determination; whether and how that non-compliance is enforced is a matter for the regulatory framework external to this instrument. The instrument’s silence on penalties means that implementers should look to the Act and Regulations for the applicable compliance architecture and any potential enforcement consequences.

This instrument operates as a technical determination under the Superannuation Industry (Supervision) Regulations 1994. It explicitly references and substitutes defined components of the Regulations’ existing formulae: the actual return formula in subregulation 9AB.12(2), the benchmark return formula in subregulation 9AB.14(2), the definition of lifestage weight in subregulation 9AB.4(1), the lookback period in regulation 9AB.6, the lifecycle Part 6A product definition in regulation 9AB.3, and the index definition in regulation 9AB.5A and table in subregulation 9AB.17(7) (see ss 7(2), 8(2), 8(5)). The instrument does not purport to amend those Regulations directly; rather it prescribes temporary substitutions to be used when applying the relevant formulae for a quarter in which a change event occurs (ss 6-8).

Specific interactions to note, taken from the instrument text:

• The instrument recognizes the base statutory formulae in the Regulations and changes particular defined inputs for a defined temporal circumstance (ss 7-8). Implementers must therefore apply the substituted definitions in place of the existing regulatory definitions for that quarter.

• The definition and application of “lookback period”, “lifecycle Part 6A product”, “index”, and the items in the table in subregulation 9AB.17(7) are external to this instrument; the instrument requires users to use those external definitions except to the extent it substitutes the lifestage-weight definition and the SAA variable for the specified subperiod (s 4; ss 7-8). In other words, this instrument is a plug-in to the existing regulatory constructs.

• The instrument refers to SAA variables used in the benchmark return formula (s 8(3)). Those SAA variables are elements of the benchmark formula contained in the Regulations. The instrument substitutes SAAa,j,t for SAAa,j,t-1 for the post-change-event subperiod, thereby altering which assumed strategic allocation is treated as active in that subperiod of the benchmark calculation (s 8(3)).

• For covered asset classes with ‘unlisted’ in their description in subregulation 9AB.17(7)’s table, the instrument prescribes an interpolation rule for deriving an assumed index value at Day X if one is not available, and then specifies that this derived value be used to compute the index amount in regulation 9AB.5A (s 8(5)). That creates a direct computational interaction between this determination and the index definition in the Regulations.

• The instrument is silent about how its modifications interact with other parts of the Act (e.g. member disclosure obligations, prudential obligations, or trustee duties) and does not modify those duties. Any effect on those obligations would flow only from the fact that the instrument alters how actual and benchmark returns are calculated for the quarter in which a change event occurs. The instrument itself does not purport to amend or displace supervisory or prudential obligations under the Act.

• The instrument’s authority is limited to subregulations 9AB.12(4A) and 9AB.14(9A) of the Regulations (s 3). It does not create new definitions affecting other regulatory regimes, nor does it reference taxation, corporations, or other legislative frameworks.

Implementers therefore need to treat this instrument as a specific computational overlay to the existing regulatory return calculations. It requires precise coordination with the Regulations’ defined formulae and parameters, but it does not itself expand or contract other statutory duties or supervisory powers within the text of the instrument.

The instrument identifies itself as Superannuation Technical Determination No. 1 of 2023 , Actual and benchmark return formulae modifications (s 1). The text of the instrument contains no further entries that indicate prior versions or subsequent amendments. It states the commencement rule (s 2): commencement is the day after registration on the Federal Register of Legislation. Section 3 records the statutory authority under which it is made: subregulations 9AB.12(4A) and 9AB.14(9A) of the Superannuation Industry (Supervision) Regulations 1994.

From the instrument text alone, the amendment history is therefore minimal:

• Naming and numbering: identified as Determination No. 1 of 2023 (s 1).

• Commencement: operates from the day after registration (s 2).

• Authority: made under specified subregulations of the Regulations (s 3).

• No textual amendments, repeals, or savings provisions are included in the instrument as published here.

The instrument does not include transitional provisions beyond the temporal application to a quarter during which a change event occurs (s 6). It does not explicitly state whether it is intended to be permanent or temporary beyond the fact that it applies to quarters in which a change event occurs; the modifications themselves are always framed as applying to the quarter during which a change event occurs (ss 6-8). The instrument does not indicate any sunset clause, periodic review requirement, or automatic revocation mechanism within its own text.

Any further amendment history, revocation, superseding determinations, or later versions would need to be tracked through the Federal Register of Legislation and the Regulations under which this instrument was made, but such subsequent material is not contained in the instrument’s text and therefore is not reported here.

The instrument’s text contains no reference to litigation, court decisions, determinations, or disputes. It does not record any judicial challenges or administrative reviews. There is no mention within the instrument of prior cases, nor of litigation arising from its application.

Accordingly, from this instrument alone:

• There is no litigation history recorded, and no cases are cited in the instrument.

• There are no internal references to administrative appeals, tribunal determinations, or judicial interpretations.

If a reader requires information on litigation or disputes concerning the application of these formula modifications, that material would not be found in this instrument and would need to be sought from court records, tribunal decisions, or regulatory enforcement actions outside the instrument text. The instrument itself does not supply any litigation context or history.

The instrument’s wording is precise and narrow; that precision generates a number of operational and legal pitfalls that are directly traceable to its text.

1. Applicability limited to MySuper lifecycle Part 6A products (s 5). RSE licensees must not apply these modifications to other Part 6A products or non‑MySuper products. Misapplying them to non‑qualifying products is a straightforward category error.

2. “Change of lifestage” requires a change visible at quarter ends and an immediately following quarter (s 4). The instrument’s definition makes the change contingent on lifestages at the end of one quarter and different lifestages at the end of the immediately following quarter. A change that occurs within a quarter but does not produce a different lifestage at the quarter‑end points set out in the lookback period may not meet the definition. Administrators must confirm that the two quarter‑end snapshots meet the definition.

3. Distinguish “change event” from “change of lifestage” and watch exclusions (s 4). The instrument defines “change event” as the date of a change of lifestage but excludes deletions due to insufficient members and creations to cater to younger cohorts. Where an operator deletes or creates lifestages for those specific operational reasons, the instrument’s modifications do not apply. This requires documentation of the reason for the deletion or creation to justify non‑application.

4. Day X is the day prior to change event (s 4). Mis‑dating Day X by a day will change which index value or which market values are used for the “beginning of quarter to Day X” segment. Precision in event timing is therefore important.

5. Data-timing asymmetry for lifestage weights (ss 7(2), 8(2)). The numerator and denominator for the pre-Day X period use market values at the end of the previous quarter; the post‑change event period uses market values at the end of the current quarter. Implementers must collect and match the correct end‑of‑quarter market values for lifestage‑referable investments. Confusion between “end of previous quarter” and “end of current quarter” will produce incorrect weights.

6. Denominator language: “market value at the end of the … quarter of all investments supporting the Part 6A product that are referable to a lifestage of the Part 6A product” (ss 7(2), 8(2)). The denominator includes all investments referable to any lifestage of the product, not just the lifestage in the numerator. Implementers must ensure consistent mapping of investments to lifestages for both numerator and denominator.

7. SAA substitution in the benchmark (s 8(3)). For the period from change event to end of quarter, SAAa,j,t replaces SAAa,j,t-1. This changes which assumed strategic allocation is applied for the post-change-event subperiod in the benchmark calculation. Implementers must be able to identify the t and t-1 values and ensure the correct one is used specifically for the post-change-event subperiod.

8. Index availability and interpolation for ‘unlisted’ asset classes (s 8(5)). If the index for an unlisted covered asset class is not available on Day X, the instrument mandates linear interpolation between the immediately available index values before and after Day X. Implementers must therefore ensure they have the immediately adjacent index values and apply linear interpolation correctly. If adjacent values are missing or misaligned, the interpolation cannot be completed as specified.

9. Multiple changes within a lookback period (s 4 note 2). A lifecycle Part 6A product may undergo one or more changes of lifestage during the lookback period. Where multiple changes occur, the instrument’s modifications may need to be applied for multiple quarters. Implementers must track each qualifying change and apply the substitution rules separately for relevant quarters.

10. No procedural or reporting instructions (ss 6-8). The instrument prescribes calculation substitutions but does not supply procedural steps, record-keeping obligations, or disclosure requirements. RSE licensees must integrate the computation rules into their existing processes and ensure they have internal controls to demonstrate compliance, even though the instrument does not specify what records to keep.

11. Narrow scope of change event exclusions (s 4). The exclusions relate only to two specific kinds of lifestage creation/deletion. Other forms of administrative or structural changes to lifestages are not excluded, and therefore could trigger the modifications. Clear documentation of the type and reason for any lifestage change is necessary to determine whether the instrument applies.

12. No penalty or enforcement text in the instrument (see Penalties and enforcement). The instrument does not state sanctions for non‑application; however, that does not remove the need to align with the Regulations and the Act where applicable. The absence of penalties in the instrument should not be read as authorising non‑compliance.

In short, the primary practical risks are misclassification of product scope, incorrect dating of Day X and change event, use of incorrect quarter-end market values, misapplication of the SAA variable, and failure to perform or document interpolation for unlisted indices. Each of these risks flows directly from the precise words and timing rules in ss 4, 7 and 8.

Below is a practical checklist derived directly from the instrument’s text to operationalise compliance for an RSE licensee that offers a lifecycle Part 6A MySuper product.

1. Confirm applicability (s 5). Before applying any modifications, confirm the product is both a Part 6A lifecycle product and a MySuper product. If not, do not apply the instrument.

2. Monitor lifestage composition at quarter ends (s 4). Maintain a process that captures the lifestage composition of the product at the end of each quarter in the lookback period. The definition of “change of lifestage” depends on comparing lifestage composition at the end of an earlier quarter with the end of the immediately following quarter.

3. Identify change events and Day X (s 4). Where the end‑of‑quarter snapshots show different lifestages, identify the date on which the change took effect (the change event). Compute Day X as the day prior to that change event. Record those dates in governance and audit logs because the partitioning of the quarter depends on them (ss 4, 7(2), 8(2)).

4. Establish reasons for creation/deletion of lifestages (s 4). If a lifestage has been deleted because of insufficient members or created to cater for a younger cohort, those scenarios are excluded from the instrument’s definition of “change event”. Document the operational reason so you can demonstrate whether the instrument applies.

5. Collect required market values (ss 7(2), 8(2)). For each lifestage:

   • Obtain market values at the end of the previous quarter for all investments supporting the Part 6A product that are referable to the lifestage (for the beginning-of-quarter to Day X subperiod).

   • Obtain market values at the end of the current quarter for those investments (for the change event to end-of-quarter subperiod).

   Ensure that the denominator is the market value at the same quarter‑end of all investments referable to any lifestage of the Part 6A product, per the substituted lifestage-weight definition.

6. Compute lifestage weights per the substituted definition (ss 7(2), 8(2)). For the quarter with a change event, compute two lifestage weights:

   • Weight for beginning of quarter to Day X using previous-quarter end market values.

   • Weight for change event to end of quarter using current-quarter end market values.

   Combine these appropriately as required by the underlying actual or benchmark formula (the instrument makes the substitution to the lifestage-weight definition used in those formulae).

7. Apply SAA substitution for benchmark (s 8(3)). For the part of the quarter from change event to end of quarter, in the benchmark return formula substitute SAAa,j,t for SAAa,j,t-1. Ensure your systems can select the correct SAA value for that subperiod.

8. Handle unlisted index values using interpolation (s 8(5)). For covered asset classes described as ‘unlisted’ in the Regulations’ table, verify whether an assumed index value exists on Day X. If not, derive the index at Day X by linear interpolation using the immediately available index values before and after Day X. Use that derived value to compute the index amount in regulation 9AB.5A, which then feeds into the benchmark return formula.

9. Maintain source documentation. Keep records that tie each computed lifestage weight, SAA selection, and interpolated index to the underlying source data: quarter‑end market values, change event date, index values used for interpolation, and the reason for any excluded lifestage creation/deletion. The instrument does not specify retention periods, but provenance is necessary to demonstrate correct application.

10. Integrate into existing calculation workflows. The instrument substitutes elements of existing regulatory formulae; adapt actuarial models, administration software and internal control checklists so that the substitutions are applied only for the quarter in which a qualifying change event occurs.

11. Audit and control. Establish checks to ensure Day X is correctly determined, that the pre‑ and post‑subperiod market values come from the correct quarter ends, that the denominator covers all lifestage‑referable investments, that SAA substitution is applied only in the post-change-event subperiod, and that linear interpolation is used only for unlisted indices where an index value is not available on Day X.

12. Coordinate with vendors and data providers. Ensure data vendors can provide market values at the required quarter‑end points and can supply index values immediately before and after Day X for unlisted indices. For outsourcing arrangements, ensure contractual obligations make the vendor responsible for delivering the precisely dated inputs needed.

13. Apply only to quarters with a qualified change event (s 6). Do not apply the substituted definitions in other quarters. Confirm through governance oversight that the modifications are not applied in error.

14. Stay aware of the link to the Regulations (s 3). The instrument operates by substituting defined elements of the Regulations’ formulae. Ensure any technical changes to the Regulations or related definitions that affect subregulations 9AB.4(1), 9AB.5A, 9AB.12(2), 9AB.14(2) and 9AB.17(7) are accounted for in the implementation.

Following these steps will align the RSE licensee’s computations with the determinations set out in ss 6-8 of this instrument. The instrument’s requirements are narrowly prescriptive and data‑driven; compliance is a matter of correct event dating, correct quarter‑end market values, correct SAA selection for the specified subperiod, and correct interpolation where required.