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Alonso Sala
CRIMINAL LAWYERS
Legal Analysis

First-Grade Prison Classification in Spain: How to Appeal (2026)

May 21, 2026Updated: 

Key Takeaways

  • First grade = closed regime
  • An exceptional measure, with reinforced reasoning
  • Periodic review, at least every 3 months
  • Appealable before the Prison Supervision Judge

First-grade prison classification is the closed regime, the most restrictive situation in serving a sentence, designed for inmates classified as showing extreme dangerousness or a manifest inability to adapt to the ordinary and open regimes. Its application is exceptional and requires reinforced reasoning grounded in the inmate's specific conduct, not in the nature of the offence. Continued classification must be reviewed periodically, at least every three months, and classification or regression to first grade can be appealed before the Prison Supervision Judge and then before the Provincial Court.

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Classification in first grade is the most restrictive situation in serving a sentence. It means the closed regime, with strong limitations on movement and communal life. As criminal defence lawyers, we explain how to challenge it.

What First Grade Is

First grade corresponds to the closed regime, designed for inmates classified as showing extreme dangerousness or a manifest inability to adapt to the ordinary and open regimes. It is the most severe grade of the prison system.

When It Applies

The application of first grade is exceptional. The nature of the offence is not enough: it must be grounded in the inmate's specific conduct within the facility. The rules require reinforced reasoning.

⚠️ An exceptional measure

First grade cannot become a disguised sanction. Case law requires objective, current facts justifying extreme dangerousness, not mere suspicion.

Periodic Reviews

Continued first-grade classification must be reviewed periodically, at least every three months. At each review the administration must assess whether the causes persist or whether progression to second grade is appropriate.

How to Appeal First Grade

Classification or regression to first grade can be appealed before the Prison Supervision Judge and then before the Provincial Court. The defence works to rebut the reasoning, prove the inmate's progress and seek grade progression.

Classified in first grade?

We analyse the reasoning for the closed regime and prepare the appeal before the Prison Supervision Judge.

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Assistance against first-grade classification and applications for grade progression.

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Frequently asked questions

What is first-grade prison classification?

First grade corresponds to the closed regime, the most restrictive situation in serving a sentence, with strong limitations on movement and communal life. It is designed for inmates classified as showing extreme dangerousness or a manifest inability to adapt to the ordinary and open regimes.

When does first grade apply?

Its application is exceptional. The nature of the offence is not enough: it must be grounded in the inmate's specific conduct within the facility, such as serious incidents, assaults or a leading role in disturbances. The rules require reinforced reasoning and it cannot become a disguised sanction.

How often is continued first-grade classification reviewed?

Continued first-grade classification must be reviewed periodically, at least every three months. At each review the administration must assess whether the causes that led to the closed regime persist or whether progression to second grade is appropriate.

How is first-grade classification appealed?

Classification or regression to first grade can be appealed before the Prison Supervision Judge and then before the Provincial Court. The defence works to rebut the reasoning, prove the inmate's progress and seek grade progression.

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