Workers' Statute Art. 64.4.d (Rider Law): obligations and deadlines

Workers' Statute, Art. 64.4.d: algorithm information for worker representatives

In forceWorkers' Statute Art. 64.4.d (Rider Law)

Summary

Since 2021 works councils and staff delegates have the right to know the parameters, rules and instructions of algorithms or AI systems that affect decisions on working conditions, hiring and job retention, including profiling. It does not require disclosing source code. A Ministry of Labor guide (2022) proposes 20 questions to comply.

Who it applies to

Companies in Spain with legal worker representation.

Penalties

Infringement under the Labor Infringements and Sanctions Act (LISOS); courts have already found violations of freedom of association for failing to inform.

Official name: Real Decreto Legislativo 2/2015, de 23 de octubre, por el que se aprueba el texto refundido de la Ley del Estatuto de los Trabajadores, art. 64.4.d) (añadido por la Ley 12/2021, de 28 de septiembre)
Official reference: RDLeg 2/2015, BOE núm. 255, de 24 de octubre de 2015; letra d) añadida por la Ley 12/2021, BOE núm. 233, de 29 de septiembre de 2021
Regulator: Labor and Social Security Inspectorate; labor courts
Official source: Check the sourceHow we verify sources

Key dates

August 12, 2021Letter d) enters into force
June 10, 2022Ministry of Labor guide on algorithmic information

Obligations and dates

Obligations table
Obligation	Article or citation	Status	Date	Who it applies to	Verification
Inform worker representatives about algorithms	Estatuto de los Trabajadores, arts. 64.4.d) y 64.5	In force	Already applicable	If you use algorithms or AI to hire, evaluate, assign tasks or shifts, set pay, monitor or dismiss staff, and you have a works council or staff delegates.	Verified in the official source on October 31, 2026

Inform worker representatives about algorithms

Estatuto de los Trabajadores, arts. 64.4.d) y 64.5In force

Already applicable

When it relates: If you use algorithms or AI to hire, evaluate, assign tasks or shifts, set pay, monitor or dismiss staff, and you have a works council or staff delegates.
What the rule provides: Give representatives in writing the system's parameters, rules and instructions and how it affects decisions.
Use the Ministry's 20 questions as a guide (which decisions, which data, what technology, human oversight, audits).
Update the information when the system changes and open consultation where appropriate.
Typical evidence: Written notice with representatives' acknowledgment.
Minutes of the information or consultation meeting.
Related base documents: AI and Algorithm Notice to Workers, Candidates and Representatives
Supporting documents: AI in Hiring Policy
Human Oversight Procedure for AI Systems
AI System Inventory
Verification: Verified in the official source on October 31, 2026Consolidated text in the BOE; in force since 2021. The ministry guide's content comes from law firms (Garrigues, Cuatrecasas).