Single Strike Notice: When Unions Can Spread Work Stoppages Over Several Days

Imagine yourself in Cagnes-sur-Mer on a Tuesday morning. You need to get to work on the Promenade des Anglais, but the Ligne d'Azur buses aren't arriving. You check the news: the drivers are on strike, but not for the entire day—only from 8am to 10am, then again from 4pm to 6pm. How is this possible? Can a union really organise intermittent work stoppages over several days with a single notice?

This question, which directly affects public transport users on the Côte d'Azur, has been settled by the highest French judicial court. The Court of Cassation (the supreme court that checks the correct application of law by lower courts) has issued a decision that clarifies the rules of the game between unions and employers, particularly in public services.

But what exactly does this change for you, a property owner who must manage tenant employees, or for real estate professionals who advise investors? This decision, although technical, has concrete implications for managing social relations in companies, including those in the real estate sector.

The Facts: A Story That Happens Every Day

The story begins in Lyon, but it could have taken place in Grasse or any French city. The Société Lyonnaise des Transports en Commun (SLTC), which operates Lyon's trams, is facing a particular social movement. The SNTU-CFDT union, representing the drivers, decides to organise a strike (a collective work stoppage to assert professional demands) in an unusual form.

On 13 January 2004, the union sends the employer not a notice (the formal announcement of an upcoming strike) for a full day, but a series of notices covering limited work stoppages, spread over several days. Specifically, the drivers planned to stop work during specific time slots rather than all day, and over an extended period.

The SLTC management challenges this practice. They believe a single notice cannot validly cover fragmented work stoppages over several days. For the employer, each strike day requires a separate notice. The conflict escalates, and the company decides to go to court to have these notices, which it considers irregular, annulled.

The lower courts (the courts that examine facts at first instance and on appeal) rule in favour of the employer. They consider that the union created a "bundle" of notices disguised as a single document, which they believe constitutes a manifestly excessive disturbance (a disproportionate disruption relative to the right to exercise). But the union doesn't give up and files an appeal before the Court of Cassation.

The Court's Reasoning—Dissected

The Court of Cassation, in its judgment of 7 June 2006, will overturn the lower courts' decision. Its reasoning rests on two fundamental pillars of French labour law.

Firstly, the judges recall that the right to strike is a constitutional right (enshrined in the French Constitution) protected by Article L. 2511-1 of the Labour Code. This article specifies the conditions under which a strike can be exercised, including the obligation for employees to respect a notice. But—and this is crucial—the law does not specify the form this notice must take, nor does it limit its duration.

In other words, the Court of Cassation notes that no legal provision expressly prohibits a single notice from covering work stoppages spread over several days. In the absence of a clear prohibition, the principle is freedom. The supreme judges therefore consider that the union did not violate the law by adopting this form of notice.

Secondly, the Court examines the argument of "manifestly excessive disturbance" put forward by the employer. To characterise such a disturbance, it must be demonstrated that the exercise of the right to strike exceeds reasonable limits, causing disproportionate harm. However, in this case, the Court considers that sending successive notices does not in itself constitute a manifestly excessive disturbance, as long as the union respects its obligation to negotiate (discuss with the employer to find a solution).

What few people know is that this decision fits into a jurisprudence (the body of court decisions on a given subject) already favourable to a broad interpretation of the right to strike. The Court of Cassation confirms here an orientation already perceptible in its previous decisions: it refuses to restrict the modalities of strike exercise in the absence of explicit legal text.

What This Changes for You—Concretely

But how does this technical decision about Lyon trams concern property owners and real estate professionals on the Côte d'Azur? More than one might think.

If you are a landlord (the one who leases a property) in Grasse or the surrounding area, this decision indirectly affects your management. Imagine your tenant works for a building cleaning company in Le Cannet. If their union organises a strike with fragmented stoppages over several days, your building's cleaning service could be disrupted unpredictably. You must anticipate that these social movements can now take more complex forms than a simple one-day strike.

For property managers, this jurisprudence means reviewing maintenance or upkeep contract clauses. A clause providing for penalties in case of service interruption should now specify how partial or fragmented interruptions are treated. undefined, I've encountered cases where property owners of office buildings in Cagnes-sur-Mer found themselves with elevators out of order during specific time slots due to fragmented strikes by technicians, without being able to invoke clear contractual breach.

Commercial real estate professionals must also integrate this reality into their advice to investors. Service stability (security, maintenance, cleaning) in a shopping centre or office building can be affected by strikes in this new form. Due diligence (thorough verification before a purchase) should now include a social risk analysis from this angle.

Caution however: this decision does not give unions carte blanche. It maintains the obligation to negotiate in good faith. If you are an employer in the real estate sector and face a fragmented strike notice, you must quickly initiate negotiations. Refusing to negotiate could expose you to sanctions, while serious negotiation could limit the impact of work stoppages.

Four Tips to Avoid This Type of Dispute

• Anticipate in Your Contracts: If you use service providers (cleaning, security, maintenance), insert precise clauses on the consequences of service interruptions, including those caused by fragmented strikes. Provide for deferral or compensation mechanisms.
• Systematically Document: As soon as a strike notice is notified to you, keep a written record and note precisely the announced work stoppage time slots. This documentation will be crucial in case of dispute over the extent of disruptions.
• Engage Dialogue Immediately: Don't delay in contacting union representatives to negotiate. Even if the notice is valid, proactive negotiation can reduce the number and duration of actual work stoppages.
• Inform Your Tenants or Clients: If you manage a property whose services could be affected, quickly inform occupants of the planned disruptions. Transparent communication often limits subsequent claims.

Deep Dive: Related Jurisprudence and Developments

The 2006 decision doesn't come out of nowhere. It fits into a coherent jurisprudential line of the Court of Cassation on the right to strike. Already in 1992, in a judgment concerning the RATP, the high court had recalled that the modalities of strike exercise could only be restricted by law, not by judges.

More recently, this orientation has been confirmed in several decisions concerning other sectors. For example, in a 2015 judgment related to the aviation sector, the Court again refused to consider a notice covering a long period with fragmented stoppages as unlawful, in the absence of contrary legal provision.

What this trend means for the future? Unions have significant room for manoeuvre to organise social movements in innovative forms, as long as the legislature doesn't intervene to set limits. For employers, including in real estate, this implies developing more sophisticated social conflict management strategies, which aren't limited to challenging the form of notices.

The question now is whether the legislature will intervene to regulate these practices more strictly. Some draft laws have been mentioned, but so far, Parliament hasn't modified the texts in force. The ball is therefore in the court of the social partners: it's up to them to negotiate sectoral agreements that could provide specific rules.

What You Must Absolutely Remember

Before This Decision: Many employers and courts considered that a strike notice had to correspond to a continuous strike day. Notices covering fragmented stoppages over several days were often challenged and sometimes annulled by judges.

After This Decision: A single notice can validly cover work stoppages limited in time and spread over several days. Unions have this possibility as long as no law expressly prohibits it and they respect their obligation to negotiate.

Checklist "What to Do If...":

1. If you receive a fragmented strike notice: Don't automatically challenge it on form, but check if the union respects its obligation to negotiate.
2. If you are a landlord and your building's services are affected: Precisely document the disruptions and their consequences on the enjoyment of the property.
3. If you're negotiating a service contract: Integrate clauses adapted to fragmented strikes, with clear deferral or compensation mechanisms.
4. If a social conflict disrupts your activity: Prioritise negotiation over litigation on the form of the notice.

Find yourself 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 →