Algeciras: The European Commission sent a reasoned opinion on 1 October 2026 telling Spain, France and Italy that their port towage flag rules breach EU law on port services. Each country requires tugs and mooring vessels that work in its ports to fly its own flag, and the Commission says that preference discriminates against vessels from other member states. The three governments have two months to respond, which puts the deadline in early December.
Brussels does not object to every flag condition. Article 4 of Regulation (EU) 2017/352 on port services lets member states require a flag for vessels used mainly in towing or mooring, provided the condition is transparent, objective, non-discriminatory and proportionate. The aim must be to enforce social and labour standards.
The Commission argues that the national rules fail that test because they favour a single flag. If a member state imposes a flag requirement, the flag of any EU member state must be accepted. National authorities can already enforce social and labour law through inspections whatever flag a vessel flies, the Commission adds, and it also cites Article 49 of the Treaty on the Functioning of the EU on freedom of establishment.
The case matters beyond tugboats. Towage and mooring keep ships moving in and out of busy ports, and operators that cannot register under the required flag may find it hard to compete for contracts in Spain, France or Italy. The Commission therefore treats port towage flag rules as a test of freedom of establishment, since a company from another member state would have to change its fleet registration before it could bid. Tug operators in the three countries are likely to follow the replies closely.
Spain offers the clearest example of the port towage flag rules in practice. The Port of Algeciras published particular specifications for port towage in the Official State Gazette in September 2025, requiring tugs to fly the Spanish flag and appear in the ordinary register, El Estrecho Digital reported. The Spanish case carries the reference INFR(2025)4021, while the French case is INFR(2025)2180 and the Italian case is INFR(2025)2181.
The reasoned opinion follows letters of formal notice that the Commission sent in January 2026 under its January infringements package. The Commission concluded that the three countries had made insufficient progress on their port towage flag rules since then.
If the answers disappoint, the Commission can refer the cases to the Court of Justice of the EU. Tug operators, port authorities and unions in the three countries now face a choice between defending national flag preferences and opening their harbours to vessels registered across the Union. The dispute over port towage flag rules will show how far the single market for port services reaches.





