ASIC Replaceable Rules Vs Company Constitution: Which Is Better?

Setting up a company in Australia means making an early call on how you’ll govern it day‑to‑day: rely on the Corporations Act’s “replaceable rules” or put in place your own tailored company constitution.

Both options are legal and widely used. The right choice depends on your plans, who your shareholders are, and how much certainty and flexibility you want as you grow.

In this guide, we’ll explain what ASIC replaceable rules are (and what they aren’t), how they compare to a customised constitution, and when small businesses should consider adopting one. We’ll also cover key clauses founders often tailor and common pitfalls to avoid.

What Are ASIC Replaceable Rules?

“Replaceable rules” are default internal governance rules set out in the Corporations Act 2001 (Cth). They cover practical things like appointing directors, calling meetings, paying dividends, and transferring shares.

Think of them as a standard template for how your company operates. If you don’t adopt your own constitution when registering your company, these rules will generally apply by default.

A few key points to keep in mind:

• They are part of the law. You don’t file or store them - they’re published in the Corporations Act and apply automatically unless you replace them.
• You can mix and match. A company can adopt a constitution that modifies or displaces some replaceable rules while leaving others in place.
• They’re generic by design. They suit many straightforward companies, but they don’t reflect your specific commercial arrangements or investor expectations.

If you’re forming a new company, you can rely on the replaceable rules or register with a bespoke Company Constitution from day one. You can also adopt or change a constitution later by shareholder vote.

How Do Replaceable Rules Compare To A Company Constitution?

The big difference is customisation. Replaceable rules give you a “one size fits most” approach. A constitution lets you design governance that fits your ownership, funding plans and risk profile.

Pros of Relying on Replaceable Rules

• Simplicity and speed for early-stage companies, especially with a single founder.
• No upfront drafting cost and less paperwork during initial registration.
• Baseline governance that aligns with the Corporations Act’s defaults.

Pros of Adopting a Constitution

• Tailor rights and obligations for founders, employees with equity, and investors (current and future).
• Address key gaps the default rules don’t cover well (e.g. founder exits, deadlocks, bespoke transfer restrictions).
• Build investor confidence - many investors expect a clear, modern constitution before they commit funds.
• Set clearer procedures for dividends, meetings, and decision‑making that match how your business actually operates.

In practice, many small businesses start with replaceable rules and then shift to a constitution as soon as they add a co‑founder, issue employee equity, or prepare for external investment. You can formally adopt a constitution by special resolution (typically 75% shareholder approval) and record that decision in your company minutes.

When Should A Small Business Adopt Or Update A Constitution?

If any of the following apply (or are on the horizon), it’s a strong signal to implement or refresh your constitution:

• You’re bringing on a co‑founder or early investors and want clarity on decision‑making and protections.
• You plan to issue different classes of shares (e.g. non‑voting or preference shares) with specific rights.
• You want rules around share transfers, including pre‑emptive rights, drag‑along or tag‑along provisions.
• You need tailored dividend policies or director remuneration approval processes.
• You want to streamline how the company executes documents under section 127 or delegates authority under section 126 of the Corporations Act.
• You’re introducing an employee equity plan and need compatibility with your rules for issuing shares.

It’s also common to adopt a constitution alongside a Shareholders Agreement. Both documents work together: the constitution governs the company’s internal mechanics, while the Shareholders Agreement sets out the commercial deal between the shareholders (e.g. decision rights, vesting, exit arrangements, dispute resolution). If there’s a conflict, you’ll want those documents aligned to avoid uncertainty.

Key Provisions You Can Customise In A Constitution

A modern constitution can be as simple or as detailed as your business needs. Here are the clauses small businesses most commonly tailor beyond the replaceable rules.

1) Classes Of Shares And Issue Of New Shares

Replaceable rules provide a general framework, but many companies want explicit powers and processes for issuing shares, creating new classes, and setting different rights (voting, dividends, liquidation preferences).

A clear drafting approach helps prevent accidental dilution or disagreements about whether certain rights exist.

2) Share Transfers And Exit Mechanisms

Founders often want pre‑emptive rights (existing shareholders get first dibs on any shares being sold) and controls on who can join the cap table. Drag‑along and tag‑along rules are also common so a sale can proceed smoothly while protecting minority holders.

3) Decision-Making, Meetings And Written Resolutions

Your constitution can streamline how directors and shareholders make decisions, including when you can rely on circular resolutions instead of meetings, and quorum requirements. Many small companies also set practical rules on notice periods and meeting formats (in‑person, hybrid or virtual).

4) Dividends And Distribution Policies

Replaceable rules allow dividends, but you may want your own criteria and process for declaring, paying, or franking dividends, tied to your growth and cashflow strategy.

5) Director Appointments, Vacancies And Conflicts

Spell out how directors are appointed or removed, how casual vacancies are filled, and how conflicts of interest are managed. Clear rules reduce boardroom friction and keep decisions valid.

6) Execution Of Documents And Delegations

You can clarify who can sign documents on behalf of the company and how. Many constitutions confirm the mechanics of section 127 execution (e.g. two directors, or a director and secretary, or a sole director/secretary) and set practical delegations under section 126 (authorised officers signing within their authority).

7) Deadlock And Dispute Resolution

Replaceable rules don’t give you a plan for when founders disagree. A constitution (often paired with a Shareholders Agreement) can include deadlock resolution steps, mediation, buy‑sell options or other exit mechanisms.

How To Move From Replaceable Rules To A Constitution (Step-By-Step)

Ready to replace the default rules with something more tailored? Here’s a straightforward process most small companies follow.

1. Draft your constitution. Start with a version that reflects your share structure, practical decision‑making, investor expectations, and any employee equity plans. If you’re also putting in place a Shareholders Agreement, ensure the documents are aligned.
2. Review director and shareholder approvals. Check your current governance position and prepare the right approvals. A Directors Resolution can recommend adoption, and shareholders will typically pass a special resolution (75% approval).
3. Hold the vote and record it. Send the notice in line with your current rules, hold the meeting (or use written resolutions), and record the special resolution and final constitution in your company records.
4. Notify ASIC as required. You generally need to notify ASIC that a special resolution has been passed and keep the constitution with your corporate records. Keep all approvals and minutes together for audit and investor due diligence.
5. Update your execution and delegation practices. Make sure your team and advisers understand how documents must be signed (consistent with section 127) and any internal delegations under section 126.

If you’re still in the formation stage, you can register the company with a tailored constitution from day one. If you need support with the mechanics of incorporation, our Company Set Up service is built for small businesses moving quickly but carefully.

FAQs: Practical Questions Founders Often Ask

Do I have to adopt a constitution?

No. Replaceable rules work fine for many early‑stage companies. But as soon as you have more than one shareholder - or plan to raise capital - a tailored constitution is usually a smart move.

Can I rely on replaceable rules forever?

Yes, in theory. In practice, investors, advisers, and later‑stage partners expect clear, tailored governance. It’s much easier to adopt a constitution before a transaction than during one.

What if my constitution and Shareholders Agreement conflict?

That’s a risk you want to avoid. Draft them together so they’re consistent, particularly around share transfers, decision rights, and dispute processes. Many founders implement both their constitution and Shareholders Agreement at the same time.

Do electronic signatures still work once I adopt a constitution?

Yes, provided your constitution and the law are followed. It helps to set clear execution rules and be mindful of when wet ink or electronic signatures are acceptable for different documents.

Common Myths And Pitfalls To Avoid

• “Replaceable rules are always enough.” They’re a great start, but they won’t reflect your unique commercial arrangements or resolve founder deadlocks.
• “We can just add clauses later without a formal vote.” Adopting or amending a constitution typically requires a special resolution. Make sure you follow proper approvals so the changes are valid.
• “A Shareholders Agreement replaces the constitution.” They serve different purposes and should be consistent with each other. Most growing companies want both.
• “Signing is the same for every document.” It isn’t. Know when you’re using company execution under section 127 and when an authorised officer is signing under section 126, and reflect this in your internal policies.
• “We’ll fix governance after we raise.” Investors will look at your governance during due diligence. Having a clean, modern Company Constitution in place can streamline the process and build confidence.

Key Takeaways

• Replaceable rules are default governance rules in the Corporations Act - they’re simple and workable for straightforward companies.
• A tailored constitution lets you set clearer rules around shares, transfers, decision‑making, dividends, and execution of documents, which is valuable as you add co‑founders or investors.
• Most growing businesses adopt a constitution by special resolution and keep it aligned with their Shareholders Agreement to avoid conflicts.
• Streamline signing and authority by referencing section 127 and section 126 mechanics in your governance and internal policies.
• If you’re ready to move beyond the defaults, you can adopt a constitution now and record the change with the right approvals, using tools like a Directors Resolution.

If you’d like a consultation on whether ASIC replaceable rules or a company constitution is right for your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.