Commercial Lease: New Law Does Not Apply to Existing Contracts

Imagine: you own a commercial property in Libourne, leased since 1988 to a bookseller. In 1989, a new law imposes stricter formalities for the notice (the notice given to the tenant). You give notice in 1995 without complying with this new rule, and your tenant challenges the validity of the notice. Who is right? The answer rests on a fundamental principle: the law does not apply to existing contracts, unless the parties have expressly so intended.

This decision of the Court of Cassation of 25 April 2001 (No. 99-15.242) is a compass for all landlords and tenants of commercial leases. It reminds that property law is not a series of reforms that sweep everything away: the legal security of contracts signed before a new law is protected. But beware, there is a trap: if the parties have voluntarily chosen to submit to the new status, they are bound.

So, how do you know if you are concerned? Analysis of a case that began in a small shop and ended before the highest French court.

The Facts: A Story Like Any Other

The case begins with a commercial lease signed on 9 March 1989 between a landlord company (the owner) and a tenant. This lease, for a term of nine years, expressly refers to the status of commercial leases (Articles L. 145-1 et seq. of the Commercial Code). Both parties voluntarily decide to submit to this regime, even though the premises could have fallen under another status (professional lease, for example).

A few years later, the owner wishes to give notice to the tenant. She sends a notice (a written notice to terminate the lease) on 30 September 1995, with six months' notice, for 31 March 1996. But the tenant contests this notice: he considers it invalid because it does not comply with the new forms imposed by Article 57 A of the Law of 23 December 1986, introduced by the Law of 6 July 1989. This provision required the notice to be given in certain specific forms, on pain of nullity.

The tenant then sues the owner before the Tribunal de Grande Instance of Bordeaux, which rules in his favour at first instance. But the owner appeals: she argues that the 1989 law is not applicable to her lease, signed before its entry into force. The case goes up to the Court of Cassation, which quashes the judgment of the Court of Appeal of Bordeaux and refers the case to the Court of Appeal of Poitiers. The twist? The referral court ultimately rules in favour of the owner, but the Court of Cassation, in its judgment of 25 April 2001, confirms that the new law does not apply to existing leases, regardless of the parties' express intention to submit to the status of commercial leases.

The Reasoning of the Court — Analysed

The Court of Cassation relies on a fundamental principle of French law: the non-retroactivity of laws. This principle, enshrined in Article 2 of the Civil Code, provides that the law only provides for the future: it cannot apply to legal situations already constituted before its entry into force. In this case, the lease was signed on 9 March 1989, i.e., before the Law of 6 July 1989 which introduced Article 57 A. Consequently, the formalities required by this article cannot be imposed on the landlord.

But why did the tenant win at first instance? Because the lease contained a clause by which the parties decided to voluntarily submit to the status of commercial leases. Some judges interpreted this clause as an intention to apply the entire status, including its future amendments. The Court of Cassation corrects this interpretation: the intention to submit to the status does not mean that the parties have accepted future laws. It recalls that Article 57 A is only applicable to leases concluded after its entry into force, unless the parties have expressly provided otherwise in their contract. In this case, no clause mentioned the application of this specific provision.

The Court also specifies that a generic reference to the articles of the status of commercial leases is not sufficient to demonstrate a clear and unequivocal intention to submit to a future law. This is a victory for legal certainty: landlords cannot be trapped by a law they could not have known at the time of signing.

What This Changes for You — Practically

If you are a landlord: this decision protects you. You do not have to fear that a new law will modify the rules of your existing lease. For example, if you signed a lease in 2020, and in 2024 a new law imposes a 12-month notice period instead of 6, you can continue to apply the 2020 rules. But beware: if you have included a clause stating that the lease is subject to the status of commercial leases in its most recent version, you could be bound.

If you are a tenant: this decision is less favourable, as it limits your ability to invoke new protections. For example, a tenant in Pessac who signed a lease in 1990 cannot require the notice to comply with the forms of the 1989 law, if his lease was signed before that law. However, if your lease contains an express review clause, you can negotiate.

If you are a buyer of a business: check the date of the lease and the applicable laws. A lease signed before 2014 (Pinel law) is not subject to the Pinel rent caps, for example. This can affect the value of the business.

Example: a landlord in Pessac gives notice to his tenant in 2023, respecting a 6-month notice period (old rule). The tenant challenges because a 2022 law imposes 9 months. If the lease was signed in 2021, the landlord can rely on the rule in force at the time of signing, unless otherwise agreed.

Four Tips to Avoid This Type of Dispute

• Draft a precise applicable law clause: in your lease, clearly state that the contract is subject to the legal provisions in force at the date of signing, and that any subsequent legislative amendment will only apply if the parties expressly agree by addendum.
• Keep the version of the law at the time of signing: keep a copy of the texts applicable at the date of the lease. In case of a dispute, you will be able to prove which rule applied.
• Use an addendum to incorporate a new law: if you wish to benefit from new protections (e.g., a longer notice period), sign an addendum with your tenant. Never assume that the law applies automatically.
• Consult a lawyer before giving notice: a simple oversight can cost months of proceedings. Check the date of the lease and the applicable formalities before sending a notice.

Further Analysis: Related Case Law and Developments

The Court of Cassation has confirmed this principle in other judgments, such as the judgment of 14 November 2001 (No. 99-20.145) which specifies that laws relating to the status of commercial leases apply immediately to existing leases only if they are of public policy. However, Article 57 A was not of public policy, as it could be excluded by the parties' intention. This distinction is crucial: some laws apply immediately (such as safety rules), others do not (such as notice formalities).

More recently, the Court of Cassation recalled in a judgment of 12 February 2020 (No. 18-22.478) that the principle of non-retroactivity protects existing contracts, unless the new law is expressly declared applicable to existing contracts by the legislator. The trend is therefore towards stability: courts are reluctant to upset contractual balances.

For the future, be attentive to laws reforming the status of commercial leases: they often specify their scope. For example, the Pinel law of 2014 applies to leases concluded or renewed after its entry into force, but not to existing leases that have not been renewed.

Summary and Next Steps

Here is what to remember:

• A new law does not apply to existing commercial leases, unless it is of public policy or the parties have expressly provided for it.
• The intention to submit to the status of commercial leases does not equate to an acceptance of future laws.
• To avoid a dispute, draft clear clauses and keep the texts applicable at the time of signing.

If you are in a similar situation, do not delay. Check the date of your lease, the laws in force at that date, and the formalities you must comply with. A dispute over a notice can cost thousands of euros in legal fees and unpaid rent.

Are you in a similar situation? A first 30-minute consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →