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Who must register as a responsible entity / direct interest holder under SOCI?

The applicability test for Register as a responsible entity / direct interest holder under SOCI (Home Affairs (SOCI)), computed across 35 industries, 9 business structures and 6 size bands.

Short answer: Only if

Applies when the business has a critical infrastructure asset.

What the obligation is

Captured critical-infrastructure assets must be registered with Home Affairs.

Part 2 of the Security of Critical Infrastructure Act 2018 (Cth) requires the Secretary of Home Affairs to keep a Register of Critical Infrastructure Assets, which is not made public. For each asset to which Part 2 applies (assets specified in the rules or declared by the Minister), the responsible entity must give operational information about the asset, and each direct interest holder must give interest and control information about itself and the asset. After the first lodgement, the reporting entity must notify any event that makes the registered information incorrect or incomplete, or that makes a new entity a reporting entity. The Cyber and Infrastructure Security Centre (CISC) administers the register as the first of the Act's positive security obligations, alongside cyber incident reporting and a risk management program.

The applicability test

Applies when the business has a critical infrastructure asset.

How the regulator frames it: The responsible entity for a critical infrastructure asset (defined for each asset class in s 12L), and direct interest holders: an entity, alone or with associates, holding a direct or joint interest of at least 10% in the asset, or an interest that puts it in a position to directly or indirectly influence or control the asset. Executors, liquidators and administrators must report for an entity that dies or fails; an agent may lodge on an entity's behalf.

What triggers it: Becoming a reporting entity for an asset to which Part 2 applies, or a notifiable event: a change that makes the operational or interest and control information held on the Register incorrect or incomplete.

Jurisdiction: Commonwealth law, so the test is the same in every state and territory.

Which industries are in or out

Outcome across the 35 industries Rules Mate maps (35 of 35: no).

The answer is the same in every industry: no. Industry does not change who must comply.

Business structure and size

Structure does not change the answer across all industries: for every structure the answer is "no".

Size does not change the answer across all industries: at every size band the answer is "no".

Worked examples

Each line is one run of the Rules Mate applicability engine for a single business profile, with the reason the engine gives:

  • Pty Ltd company in real estate agents with 6–19 employees, turnover $1M–$3M: does not apply. Requires a critical infrastructure asset.

Answers that bring it into scope

Starting from a small or large professional services company that does not otherwise meet the test, each of these single facts changes the engine's answer:

  • The business operates a critical infrastructure asset: it then applies (operates a critical infrastructure asset (SOCI Act)).

What you must do, and when

When due
Initial information by the later of the end of the asset's grace period and 30 days after becoming a reporting entity (s 23). Notifiable events within 30 days after the event (s 24).
Frequency
When a triggering event occurs
Evidence to keep
Asset-class assessment against the CISC definition guidance; lodged operational information or interest and control information in the approved form and its acknowledgement; ownership and control register mapping 10% interests and associates; change-management trigger so notifiable events reach the register within 30 days; records of best endeavours where information could not be obtained (s 25).
Status
Current
Priority
High

Penalty for not complying

Maximum penalty: Each of s 23 and s 24 is a civil penalty provision of 50 penalty units ($18,200). Under Regulatory Powers (Standard Provisions) Act 2014 s 82(5) a court can order a body corporate to pay up to 5 times that amount, $91,000. Civil penalty provisions of the SOCI Act can also be enforced by infringement notices, enforceable undertakings and injunctions.

Audit or assurance level

Rules Mate has not yet classified the audit or assurance level for this obligation. Any audit, review or certification requirement is set by the regulator source listed below.

Obligations with the same applicability test

Where it sits in the corpus

Rules Mate tracks 5 published obligations tagged "soci", 2 of them rated critical. For a professional services Pty Ltd company with 6–19 employees operating in every state, 0 of those apply outright. This obligation is rated high priority, and is triggered by events.

Regulator, legislation and tools

Regulated by Cyber and Infrastructure Security Centre — Department of Home Affairs.

Home Affairs (SOCI): Administers the Security of Critical Infrastructure Act 2018 — registration, risk management programs, and mandatory cyber incident reporting for critical infrastructure assets.

SOCI Act: Federal critical infrastructure protection regime.

Free tools that help with this obligation:

Questions

Who must register as a responsible entity / direct interest holder under SOCI?
Applies when the business has a critical infrastructure asset.
Do sole traders need to register as a responsible entity / direct interest holder under SOCI?
No. Across every industry and every size band, the engine's answer for a sole trader is: no.
Do businesses with 1–5 employees need to register as a responsible entity / direct interest holder under SOCI?
No (1–5 employees, turnover $100K–$1M).
When is "Register as a responsible entity / direct interest holder under SOCI" due?
Initial information by the later of the end of the asset's grace period and 30 days after becoming a reporting entity (s 23). Notifiable events within 30 days after the event (s 24).

Related

Sources

Computed by the Rules Mate applicability engine from the published obligation corpus; facts last checked 3 October 2026. Rules Mate is not a law firm and this is general information, not legal advice. Confirm your position with the regulator source or a qualified adviser before acting.