ASIC Market Integrity Rules (Securities Markets) Determination 2026/166

The central concept is the distinction between a "Tier 1 Equity Market Product" and a "Tier 2 Equity Market Product". However, the instrument does not define either term in substance. Instead, it defines them by reference to the schedules: any equity market product whose stock code appears in Schedule 1 is a Tier 1 product; any appearing in Schedule 2 is a Tier 2 product. The underlying meaning of "Equity Market Product" is taken from the Rules, not from this determination. The instrument incorporates by reference the definitions and interpretative provisions of the Rules, including the defined term "stock code", which is given a specific meaning here: the unique symbol assigned to the product under Rule 9.2.3 of the Rules.

The instrument also relies on the concept of "issuer" to identify the entity responsible for the product. However, the issuer is listed only for identification purposes; the legal effect attaches to the product itself, not to the issuer's corporate form. For example, AMCOR PLC (item 3 in Schedule 1) is a foreign incorporated entity, yet its product is classified as Tier 1. Similarly, several exchange-traded funds appear in both schedules: VAS (Vanguard Australian Shares Index ETF) is Tier 1, while A200 (BetaShares Australia 200 ETF) and AAA (BetaShares Australian High Interest Cash ETF) are Tier 2. The same issuer may have products in both tiers and of multiple types.

There is no concept of a "Tier 3" or any other tier in this instrument. The Rules may define such categories, but this determination only addresses two tiers.

Another key concept is that the instrument is a "determination" made by a delegate of ASIC, not by the full Commission. It is a legislative instrument, meaning it has the force of law and is binding on market participants. It must be registered and is subject to tabling in Parliament. However, the instrument itself provides no explanation of the criteria used to allocate products to tiers, nor does it include a provision for review or appeals. Market participants must accept the classification as given unless they challenge it through a merits review or judicial review process under administrative law, but no such right is mentioned in the instrument.

The instrument directly affects the 110 identified issuers whose equity market products are listed in the schedules. For each issuer, the classification determines which subset of the Market Integrity Rules applies to their product. The largest and most liquid stocks are concentrated in Schedule 1: major banks (CBA, ANZ, NAB, WBC), miners (BHP, RIO, FMG, S32), and large industrials (WES, WOW, TLS, CSL). But the list also includes smaller companies such as Life360 (stock code 360), Dronesheild (DRO), and Zip Co (ZIP). The inclusion of these smaller capitalisation stocks alongside the blue chips suggests that tier allocation is not purely based on market capitalisation, liquidity, or free float. The instruments criteria, if any, are opaque.

Indirectly, the instrument affects all market participants who trade, clear, settle, or provide services in relation to these products. Brokers, market makers, and algorithmic traders must ensure their systems correctly identify the tier of each product to apply the correct trading rules, pre trade risk controls, post trade reporting, and market conduct obligations. Exchanges and trading venues must enforce tier specific rules for order types, trade reporting, and market manipulation detection. The classification also affects clearing and settlement arrangements, margin requirements for derivatives referencing these products, and the obligations of sponsors and listing agents.

Investors are indirectly affected because the regulatory regime influences market quality, liquidity, spreads, and information flow. If Tier 1 products are subject to more stringent reporting or market making obligations, that may improve price discovery but also increase compliance costs, which may be passed on to investors. Conversely, Tier 2 products may have lighter obligations, which could reduce costs but also lead to wider spreads or less surveillance.

ASIC itself is affected: it must use this classification as the basis for its surveillance, enforcement, and rule making. The classification provides a legal fact that can be used in administrative actions and court proceedings. The instrument also affects other regulators, such as the Reserve Bank of Australia (for financial stability oversight) and the Australian Competition and Consumer Commission (for competition concerns), though the instrument does not reference them.

The instrument itself imposes no duties and confers no rights. It is purely classificatory. The duties and rights arise from the Rules, the Corporations Act 2001, and the ASIC Act 2001, which are not part of this instrument. However, the classification is a precondition for those duties to apply differently to different products. For example, if the Rules require Tier 1 products to be traded on a lit order book only, or to have a minimum tick size, or to be subject to continuous reporting of large trades, those obligations become binding on the relevant market participants only because this determination has placed the product in Tier 1.

Issuers have a right to know their classification, which is publicly available from the Federal Register of Legislation. They may also have a right to request ASIC to amend the determination, though no such process is mentioned. In the absence of any review mechanism, an issuer who believes it has been wrongly classified would need to rely on informal representations to ASIC or pursue judicial review, a costly and uncertain path.

Market operators (such as ASX and Chi-X) have duties to ensure their trading systems and rule books reflect the determination. They must classify each product correctly and apply the relevant Rules. They also have a right to be notified of any changes to the determination. Brokers and other market participants have a duty to comply with the Rules as they apply to each product, which requires them to know the tier of each product they trade. They cannot rely on ignorance of the determination as a defence.

There is no right to a hearing before inclusion in a schedule, no right to know the criteria used, and no right to seek compensation if classification leads to higher costs. The instrument creates a unilateral regulatory fact that participants must accept and adapt to.

No penalties are set out in this instrument. Any enforcement action would be taken under the Rules or the Corporations Act for breach of the underlying obligations that depend on the classification. For example, if a market participant trades a Tier 1 product in a manner that is only permitted for Tier 2 products, they could be in breach of Market Integrity Rule X. The penalty for such a breach might be a civil penalty, an infringement notice (a fine issued by ASIC), or a court order requiring compliance. The maximum penalty for serious contraventions of market integrity rules can be millions of dollars for bodies corporate, with additional orders for disqualification and compensation.

ASIC is the primary enforcement body. It can investigate suspected breaches and may use the determination as evidence of the correct classification. The determination itself cannot be directly enforced because it merely states a fact; enforcement flows from the Rules that reference that fact.

There is no criminal penalty specifically attached to this determination. However, if a person knowingly misclassifies a product in order to circumvent a market integrity rule, they could be liable for market manipulation or other offences under the Corporations Act. The instrument does not create any strict liability offences.

Because the instrument is a legislative instrument, a court may find it invalid if it is beyond the power granted by subrule 6.2.1(4) or if it is unreasonable in a legal sense. That would open the door to a challenge, but that challenge would be against the determination itself, not against a penalty.

This determination operates within a larger ecosystem of securities regulation. It is made under the ASIC Market Integrity Rules (Securities Markets) 2017, which themselves are made under section 798G of the Corporations Act 2001. That section gives ASIC power to make market integrity rules for licensed markets. The determination is subordinate to both the Rules and the Corporations Act. If there is a conflict, the Act prevails.

The determination may also interact with the ASIC Market Integrity Rules (Futures Markets), though it only addresses securities markets. It does not affect the treatment of derivatives, foreign exchange, or other products not classified as equity market products under the Rules.

The classification could interface with other ASIC determinations, class orders, and regulatory guides. For example, ASIC has issued guidance on waivers for certain market integrity rules, and that guidance may refer to tiers. The determination may also interact with the market operator's own listing rules, especially regarding admission, suspension, and trading halts. If a product's tier changes due to a later determination, that could trigger notification obligations under the listing rules.

Tax and accounting laws do not directly refer to this determination, but the classification may affect how financial instruments are reported for tax purposes if reporting requirements differ by tier.

Foreign entities listed in the schedules (such as AMCOR PLC, Light & Wonder Inc. CDI, Block Inc) may be subject to overlapping regulatory regimes in their home jurisdictions. The determination does not exempt them from foreign laws, but it imposes additional Australian obligations.

The instrument is silent on how it interacts with the Competition and Consumer Act 2010 or the Privacy Act 1988. There is no evident conflict, but market participants must comply with all applicable laws.

This is a new legislative instrument, made on 4 March 2026, with no prior versions. It has not been amended, repealed, or replaced. There is no sunset clause. The instrument will remain in force until it is expressly revoked or replaced by a later determination. ASIC may issue amending determinations to add, remove, or reclassify products. Because the instrument is a legislative instrument, any amendment must be made by a similar process and registered on the Federal Register of Legislation.

The absence of a transitional provision means that if a product's classification changes, participants must comply with the new classification immediately upon the amendment's commencement. There is no grace period. This creates operational risk for firms that need time to update systems and processes.

Given that the list includes 110 specific products, it is highly likely that ASIC will amend it periodically to reflect new listings, delistings, corporate actions (such as mergers, demergers, or stock code changes), and changes in market conditions. However, the instrument does not require ASIC to update it at any particular frequency. The decision to amend is entirely at ASIC's discretion.

The instrument is too recent to have generated any litigation. As at the date of writing, there are no reported cases involving this determination. Future litigation could arise if a party contests the validity of the classification, arguing that ASIC exceeded its power under subrule 6.2.1(4) or that the classification is irrational or arbitrary. A court would examine whether the determination is within the scope of the delegated power and whether the decision maker considered relevant factors. Because the instrument does not state the criteria used, a challenger might argue that there is no discernible basis for the classification, making it susceptible to challenge on unreasonableness grounds.

Another possible litigation source is an enforcement action where a defendant argues that they reasonably believed a product was in the other tier. However, ignorance of the law (including the contents of this instrument) is generally no defence. The determination is a public document, and market participants are expected to know its contents.

There may be litigation regarding the correctness of the stock code or issuer name in the schedules if a clerical error leads to a misclassification. The instrument does not contain a severability clause, so a mistake might affect the entire schedule if not rectified quickly.

Several features of this instrument warrant close attention. First, the classification is not based on transparent, objective criteria. No reasons are given for why LIFE360 INC is Tier 1 while BLOCK INC is Tier 2, or why VAS is Tier 1 but A200 is Tier 2. This opacity creates uncertainty for market participants who need to anticipate future classifications. It also invites regulatory capture: firms with lobbying power may receive favourable classifications.

Second, the list is static. If a new company lists on the ASX after this determination, it is automatically unclassified for the purposes of the Rules until ASIC issues an amending determination. That gap period creates legal uncertainty about which rules apply. Market participants may need to treat unclassified products in a default manner, but the default is not provided in this instrument. The instrument only covers 110 products, a small fraction of the thousands listed on ASX.

Third, the instrument includes several exchange-traded funds (VAS, A200, AAA, IVV, VGS) and foreign domiciled entities. Their inclusion subjects them to the same regime as equity securities, which may not be appropriate given their different risk profiles. For example, an ETF may have different liquidity characteristics than a single stock, yet the tier classification treats them equally.

Fourth, the commencement condition is complex: the later of 8 April 2026 and 20 business days after registration. This means that if registration occurs after 10 March 2026 (for example), the commencement could be delayed. Market participants must track the registration date closely to know when the instrument takes effect.

Fifth, the instrument does not include any grandfathering provisions for pre-existing arrangements. Contracts, trading systems, and compliance manuals that rely on the previous classification (if any) must be updated immediately upon commencement. There is no transition period.

Sixth, the instrument potentially imposes significant compliance costs on smaller issuers in Schedule 1 that may not have the scale to handle Tier 1 obligations. If Tier 1 rules are more onerous, a small company like Dronesheild (DRO) or Zip Co (ZIP) will face a disproportionate burden relative to larger competitors.

Seventh, the instrument uses "stock code" but does not address the possibility of code changes. If a company changes its stock code (e.g., after a name change), it would no longer match the schedule and would fall out of coverage unless the instrument is updated. This creates a trap for unwary market participants who may think the product is still classified.

Compliance with this instrument itself is straightforward: no one is required to do anything with the instrument except know its contents. However, because the instrument determines which Rules apply, compliance entails integrating the classification into every aspect of market operations.

Step 1: Determine whether your product is listed. Each issuer, broker, and market operator should check Schedules 1 and 2 for each product they issue, trade, or clear. The instrument is available on the Federal Register of Legislation. The stock code is the simplest identifier. If a product is not listed, it is not a Tier 1 or Tier 2 product under this determination. In that case, you must look to the Rules to determine the default treatment.

Step 2: Identify the applicable Rules. The classification triggers specific provisions in the ASIC Market Integrity Rules (Securities Markets) 2017. Those rules are not part of this instrument, so you must read them separately. Identify which rules refer to "Tier 1 Equity Market Product" or "Tier 2 Equity Market Product". For example, there may be rules about minimum order sizes, trade reporting thresholds, pre trade transparency, or best execution that differ by tier.

Step 3: Update systems and procedures. Trading systems, risk controls, compliance monitoring tools, and reporting templates must be configured to treat each product according to its tier. This may involve updating reference data tables, logic for order handling, and connection to ASIC's data feeds. A table mapping each stock code to its tier should be maintained and regularly reconciled against the instrument.

Step 4: Train staff. Traders, compliance officers, settlement staff, and IT personnel need to understand which tier each product belongs to and what that means for their workflows. The classification may affect everything from pre trade credit checks to post trade surveillance alerts.

Step 5: Monitor for amendments. ASIC may update the determination at any time. Subscribe to ASIC updates and check the Federal Register of Legislation periodically. When a new determination is made, repeat steps 1 through 4. Consider building a process that automatically compares the new instrument to the old one and identifies changes.

Step 6: Document compliance. Keep records showing that you have correctly classified each product and applied the appropriate rules. This will be important if ASIC questions your treatment during an inspection or investigation.

Step 7: Consider legal advice. If the classification seems anomalous or if a product is not covered, seek legal advice on the correct approach. Do not assume that the default treatment is the same as either tier. The instrument itself does not provide a fallback.

For market operators: you must ensure that your market rules and trading systems reflect the classification. For any new product admissions, you will need to seek ASIC's classification if it is not already in the determination.

For clearing and settlement facilities: you may need to adjust margin requirements or settlement cycles based on the tier.

For foreign issuers: determine whether the Australian classification conflicts with home country regulations and manage the resulting compliance burden.