- Why restraint clauses need a safety net
- What a cascading clause actually does
- A cascade in action: the OAMPS case
- Where the mechanism breaks down
- Where cascades show up
- The unfair contract terms angle for small business contracts
- When to bring in a lawyer
- The top rung decides how the court reads the whole ladder
When you open a contract and find a restraint of trade clause listing several time periods, several geographic areas and several types of conduct, you are usually looking at a cascading clause. The idea is straightforward: instead of one restraint, the contract sets out a ladder of alternatives, each drafted as a separate promise, so that if a court knocks out the widest option it can still enforce a narrower one. Cascading clauses appear in Australian employment agreements and business sale contracts because they give the protected party several chances to have something enforced. This guide explains how the mechanism works, what a court actually does with a challenged cascade, and the drafting choices that decide whether it survives.
Why restraint clauses need a safety net
At common law, a restraint of trade is contrary to public policy and void unless it is reasonable. That starting point has driven the way Australian contracts are drafted for more than a century. A restraint will only be enforced if it protects a legitimate business interest of the party relying on it, such as goodwill, confidential information or client connections, and only to the extent that its scope, duration and geographic reach are no more than reasonably necessary to protect that interest.
Two parties' interests pull in opposite directions here. The employer or buyer wants protection after the relationship ends: a departing employee who knows the clients, or a vendor who knows the customers and suppliers, can do real damage. The employee or vendor wants to keep working, and courts are wary of letting a business fence off competition it never owned in the first place. A court asked to enforce a restraint will weigh the protected interest against the burden on the person restrained, and it is this balancing that makes single, fixed restraints a gamble. If a court finds the only restraint in the contract too wide, the clause fails and the employer or buyer is left with nothing.
A cascading clause is a drafting response to that risk. It does not change the test. It simply gives the court a menu of narrower options to fall back on when the widest version goes too far.
What a cascading clause actually does
The New South Wales Supreme Court described the mechanism in OAMPS Insurance Brokers Ltd v Hanna [2010] NSWSC 781: a cascading restraint allows for a number of different combinations of operation, in decreasing amplitude of time and area, and such clauses are also described as "ladder" clauses and "step" clauses.
In practice, a cascade is a matrix. The contract fixes the conduct to be restrained and then offers a range of durations, a range of areas, and sometimes a range of activities, with each combination stated to operate as a separate and independent restraint. A simple example for a sales manager might look like this:
- For 12 months, 9 months, 6 months or 3 months after the employment ends
- Within Australia, within New South Wales, within the Sydney metropolitan area, or within 10 kilometres of the business premises
- Restraining the person from soliciting clients, from dealing with clients, or from working for a competitor
Each pairing of period, area and conduct is its own promise, and the clause will typically add that each promise is intended to be severable from the others. If a court finds the 12-month national ban too wide, the 6-month or 3-month version, or the Sydney-only version, remains available for enforcement.
What happens when a restraint is challenged
When a former employer or buyer applies to enforce a cascade, the court works through a sequence. First, does the restraint protect a legitimate business interest? Second, is the restraint reasonable in scope, time and area? If the answer to both is yes, the widest version is enforced as written. If the widest version is too broad, the court looks for a narrower version it can enforce, and the drafting of the cascade determines what options are available.
Severance at common law
Outside New South Wales, the traditional rules apply. A court may strike out the offending words and enforce the rest, but only where the remaining promise still makes grammatical and commercial sense without rewriting the clause. This is the "blue pencil" approach, and it is exactly why a cascade must present each alternative as a clean, standalone promise. If the options are tangled together so that removing the widest one leaves a sentence that no longer works, severance fails and the whole restraint falls.
Read down under the NSW statute
New South Wales goes further. Under s 4(1) of the Restraints of Trade Act 1976 (NSW), a restraint of trade is valid to the extent to which it is not against public policy, whether it is in severable terms or not. That provision lets a NSW court "read down" a restraint and enforce it at a reasonable level, even where the clause is not drafted in severable parts. The practical consequence is that a cascade matters most in the states and territories that rely on the common law approach, because there the clean separation of each rung is what keeps the narrower options alive.
The NSW statute carries a warning for overreach as well. Under s 4(3), where a person subject to a restraint applies to the court, and the restraint is against public policy by reason of a manifest failure by the person who created it to attempt to make it a reasonable restraint, the court may order that the restraint be altogether invalid. In other words, a top rung that is wildly excessive can cost the party everything, not just the top rung.
A cascade in action: the OAMPS case
OAMPS Insurance Brokers Ltd v Hanna [2010] NSWSC 781 shows how a court actually handles a cascade. OAMPS was an insurance broker. A senior employee signed a post-employment restraint deed with covenants not to solicit or entice employees, contractors, officers, agents or suppliers of the company, and not to deal with clients, with each covenant applying within defined periods and areas. The deed produced nine separate restraint combinations, in decreasing amplitude of time and area, and clause 4 stated that each restraint resulting from any combination constituted a separate and independent provision, severable from the others.
The employee argued the deed was void for uncertainty. The argument was not that the words lacked clear meaning, but that the nine combinations were inconsistent with each other and no mechanism selected which one operated. Hammerschlag J rejected that argument. The deed was not void for uncertainty, and a 12-month restraint was reasonably required to protect the company's legitimate business interest. Injunctions were ordered.
The case is a useful benchmark. A cascade with nine combinations, each cleanly expressed and separately severable, was enforceable. It also shows that the reasonableness question is decided against the evidence of what the business actually needed to protect, not against the length of the clause.
Where the mechanism breaks down
The OAMPS decision distinguishes cascades that work from cascades that do not. In an earlier case, Austra Tanks Pty Ltd v Running [1982] 2 NSWLR 840, the clause defined "stipulated period" and "stipulated area" in terms that permitted over 82,000 permutations. Wootten J held the restraint uncertain: the parties had not defined their obligations precisely, and the problem could not be solved because the agreement contemplated only one covenant and no one could say which one was intended. The difference from OAMPS is instructive. A cascade fails for uncertainty when the combinations multiply beyond what any reader can apply, and when each rung is not stated as an independent promise but as variations on a single covenant.
Other common failure points include:
- Undefined terms: "competitor" and "client" left vague invite argument. Defining clients as those the person had material dealings with in the last 12 months removes a whole class of dispute.
- Overlapping combinations: rungs that partly duplicate each other create confusion about which promise applies and make severance harder to apply cleanly.
- One size fits all: a national 24-month ban drafted for an intern signals overreach to a court and can infect how the rest of the clause is read.
- Ignoring the jurisdiction: in states without the NSW read-down power, a clause that cannot be severed cleanly fails in its entirety, so the cascade must be self-sufficient.
Where cascades show up
The same drafting technique appears across several common transactions, and the reasonableness calculus shifts with the context:
- Employment agreements: the strictest setting, because the employee needs to earn a living. Courts scrutinise the restraint against the employee's actual role, seniority, access to confidential information and influence over clients. The OAMPS case is an example of the scrutiny in action.
- Sale of business: courts are more willing to uphold restraints here, because the buyer has paid for the goodwill and needs time to secure it, and the vendor has been compensated for giving up the right to compete. That does not make any restraint enforceable. A restraint that reaches beyond the goodwill actually bought can still fail.
- Contractor and distribution agreements: cascades appear to stop poaching of clients or misuse of confidential information after the relationship ends.
- Franchise agreements: restraints protect the franchisor's brand, network and systems when a franchisee exits.
In every context the principle is the same: the restraint must protect a real interest and go no further than reasonably necessary to protect it.
The unfair contract terms angle for small business contracts
For standard form business contracts with small businesses, there is a second layer of risk. Under s 23 of the Australian Consumer Law (Schedule 2 of the Competition and Consumer Act 2010 (Cth)), a term of a consumer contract or small business contract is void if it is unfair and the contract is a standard form contract. A small business contract is one where at least one party carries on business with fewer than 100 employees, or has turnover under $10 million.
Since 9 November 2023, changes made by the Treasury Laws Amendment (More Competition, Better Prices) Act 2022 (Cth) went further. Proposing an unfair term in a standard form consumer or small business contract, or applying or relying on one, is now a contravention that attracts pecuniary penalties under s 224 of the Australian Consumer Law: up to $2.5 million for an individual, and for a body corporate the greater of $100 million, three times the benefit gained, or 30 per cent of adjusted turnover.
The practical effect for restraints is this. Employment agreements generally sit outside the regime, which is aimed at standard form contracts with consumers and small businesses, but restraints in contractor, franchise and supply agreements can be examined under it. A restraint that goes further than reasonably necessary to protect a legitimate interest is the kind of term a court or regulator could treat as unfair, particularly where the other side had no real opportunity to negotiate. A proportionate, targeted cascade is the best defence, and if you run a template contract that contains restraints, a periodic review of the terms against the current law is a sensible safeguard.
When to bring in a lawyer
The point at which professional help pays for itself is before signing, not after a dispute starts. A practitioner drafting a restraint will calibrate each rung of the cascade to the actual risk: the role, the access to clients and information, the geographic footprint of the business, and the consideration paid in a sale. They will also define the key terms, keep each option as a separate promise, and make sure the clause can survive in the jurisdiction where it is most likely to be enforced, remembering that the NSW read-down power is not available elsewhere.
For the party being asked to sign, a practitioner will test whether the top rung is genuinely defensible, push for narrower conduct-based restraints, and negotiate carve-outs such as passive shareholding or work outside the defined activities. If a dispute has already started, enforcement is often urgent, with employers seeking interlocutory injunctions in the court's duty list, and the quality of the drafting decides how much room the court has to grant relief. A review of standard form agreements for unfair contract terms exposure is a separate check worth doing for any business that contracts with small businesses on its own terms.
The top rung decides how the court reads the whole ladder
The cascade only works if every rung is a genuine attempt at a reasonable restraint, and the rung the court sees first is the widest one. A top option that is obviously excessive does two kinds of damage. In NSW, it can be treated as a manifest failure to make the restraint reasonable, giving the court power under s 4(3) of the Restraints of Trade Act 1976 (NSW) to void the lot. Elsewhere, if the rungs cannot be separated cleanly, the same overreach can take the whole clause down with it. The drafting discipline that makes a cascade work is therefore to set the widest option within the bounds you would genuinely argue for, so the clause reads as a calibrated set of choices rather than an attempt to grab as much as possible. That is the difference between a clause a court can work with and one it will strike out.
If you are drafting a restraint, reviewing one you have been asked to sign, or facing an application to enforce one, Artificer Legal can help you work out where each rung should sit and how to protect your position. Getting the assessment done early is usually far less expensive than losing the restraint entirely.