---
title: "Substantial holding notice preparation checklist (Corporations Act s 671B)"
url: "https://ailawframework.com/precedents/capital-markets-and-securities-ecm-dcm-and-disclosure/substantial-holding-notice-preparation-checklist"
type: "precedent"
site: "AI Law Framework"
id: "a4-substantial-holding-notice-preparation-checklist"
area_id: "A4"
kind: "checklist"
ai_level: "yellow"
version: 1
task_ids: ["A4-X20260927-8"]
law_stated_as_at: "2026-10-18"
---

# Substantial holding notice preparation checklist (Corporations Act s 671B)

> A checklist for preparing a substantial holding notice: which event triggers it, tracing relevant interests and associates, working the 1% movement against the last notice, the 2 business day deadline (or 9.30 am next…

Canonical page: https://ailawframework.com/precedents/capital-markets-and-securities-ecm-dcm-and-disclosure/substantial-holding-notice-preparation-checklist  
Law stated as at: 2026-10-18

Site index for agents: https://ailawframework.com/llms.txt

A checklist for preparing a substantial holding notice: which event triggers it, tracing relevant interests and associates, working the 1% movement against the last notice, the 2 business day deadline (or 9.30 am next trading day in a bid period), contents and the agreements that must accompany it.

## Key facts

- Kind: Checklist. Steps or checks to work through and tick off.
- Practice area: [Capital Markets & Securities — ECM/DCM and Disclosure](https://ailawframework.com/precedents/capital-markets-and-securities-ecm-dcm-and-disclosure.md)
- Jurisdictions: Australia
- AI level: Yellow. AI can help in set ways. A lawyer checks specific points before use.
- Law stated as at: 2026-10-18
- Status: Maintained. Checked on 2026-10-18 against the 3 authorities it cites, for Australia.

## When to use it

Use whenever a client (fund, corporate or individual investor) acquires or disposes of interests in a listed company or listed scheme near or above the substantial holding threshold, enters a relevant agreement, makes a takeover bid, or changes its associates. Start as soon as the client becomes aware of the triggering information.

## Used for these tasks

- [Prepare a substantial holding notice and the relevant-interest trace](https://ailawframework.com/practice/capital-markets-and-securities-ecm-dcm-and-disclosure.md#A4-X20260927-8)

## How AI may be used

AI may build the holdings and movement table from custody and trade records and draft the notice data; a lawyer decides the relevant interests, the associates and whether a notice is triggered, and checks the figures before lodgement.

**AI may:**

- Build a table of holdings by entity, custodian and account from the records supplied, with dates
- Calculate the voting percentage and the movement since the last notice using the total votes from the latest issuer data
- List the agreements that may have contributed to the change, for the lawyer to assess

**AI must not:**

- Must not decide who has a relevant interest, who is an associate or whether an agreement is a relevant agreement
- Must not use a total votes figure that has not been checked against the issuer's latest ASX announcements
- Must not lodge the notice

**The lawyer checks:**

- Relevant interests traced through the group (including control, power to vote or dispose, and s 671B(7) extensions) and associates identified
- Trigger and awareness date identified, and the deadline calculated from it
- Percentage and movement correct against the issuer's current total votes and the last notice lodged
- Accompanying documents included unless the transaction took place on market, and copies endorsed as true copies

## Authorities

- [Corporations Act 2001 (Cth) s 671B(1), (2) (when information must be given: beginning or ceasing to have a substantial holding, a movement of at least 1%, a takeover bid; how a 1% movement is measured)](https://www.austlii.edu.au/cgi-bin/viewdb/au/legis/cth/consol_act/ca2001172/s671b.html)
- [Corporations Act 2001 (Cth) s 671B(3), (4), (5) (contents; prescribed form; accompanying agreements and statements; exception for on-market transactions)](https://www.austlii.edu.au/cgi-bin/viewdb/au/legis/cth/consol_act/ca2001172/s671b.html)
- [Corporations Act 2001 (Cth) s 671B(6), (7) (deadline: within 2 business days, or by 9.30 am on the next trading day during a bid period; extended relevant interests)](https://www.austlii.edu.au/cgi-bin/viewdb/au/legis/cth/consol_act/ca2001172/s671b.html)

## Full text and drafting notes

The full text and the drafting notes are not part of this public page. Signed-in firm accounts can read them at https://ailawframework.com/precedents/capital-markets-and-securities-ecm-dcm-and-disclosure/substantial-holding-notice-preparation-checklist and through the signed-in MCP connector https://ailawframework.com/mcp/firm.

*Practice guidance for planning and review. Confirm current primary sources and the requirements of the actual matter. This is general information, not legal advice.*