The case, explained
Supreme Court Criminal United Sections: Grounds on Prescription and Intertemporal Law
8 min read · Updated October 2026 · Editorial oversight: Avv. Federico Papa
With the recent Constitutional Court ruling confirming the orientation of the Supreme Court United Sections, the long debate on the survival of the 2017 reform has finally closed. The central issue concerns the possibility of applying the eighteen-month suspension of prescription after judgments on the merits for crimes committed between August 2017 and December 2019, despite this rule having been formally repealed by the 2021 reform. According to reports from the specialized press, this complex regulatory interplay created a network of transitional regimes that engaged the highest judicial bodies to resolve thousands of pending proceedings. Unlike other United Sections interventions focused on specific civil or procedural matters, this contribution exclusively analyzes the intertemporal regime of criminal prescription. The analysis focuses on the coexistence of repealed norms and new provisions, explaining why, for a specific timeframe, the old regime continues to produce effects. Through the twin case of Gaio Sventura, we will see how the application of lex mitior does not follow automatic cancellation logic but requires a comprehensive assessment of the punitive and procedural treatment.

In brief
The article examines the decision of the United Sections and the Constitutional Court on the validity of the prescription suspension (2017 regime) for acts committed in 2017-2019. Despite the repeal by the 2021 reform, case law has established the survival of the old regime as part of an overall more favorable system compared to the total block of prescription after the first instance, clarifying the criteria for applying the principle of legality over time.
The fact
The case arises from a series of appeals regarding minor offenses and misdemeanors committed between August 3, 2017 and December 31, 2019, a period during which the so-called 2017 reform was in force. According to reports from outlets such as Sistema Penale and Diritto e Giustizia, several defendants had claimed that the crimes were time-barred during appeal or Supreme Court stages, arguing that the 2021 reform, by repealing the rules on prescription suspension, had retroactively eliminated the eighteen-month extension provided by the old regime.
The matter reached the highest level of judicial review after single sections of the Supreme Court expressed conflicting orientations: some believed that the express repeal should favor the defendant by eliminating the suspension, while others argued that the rule should remain applicable to acts committed under its validity. The proceedings reached the United Sections at a crucial interpretive stage, while the Court of Appeal of Lecce parallelly raised a question of constitutionality, the resolution of which by the Constitutional Court definitively established the legitimacy of the 2017 reform's survival for that specific time window.

The norms at play
The legal analysis revolves around the rules on the suspension of prescription, in the version introduced by the 2017 reform, which provided for the suspension of prescription for a maximum of 1.5 years after a first-instance conviction and another 1.5 years after the appeal judgment. This rule served to prevent the extinction of the crime during the appeal stages. The 2021 reform subsequently repealed these paragraphs, while introducing the definitive block of prescription after the first-instance sentence and the new institution of Improcedibility for exceeding trial duration limits.
Finally, the rules on the succession of criminal laws over time establish the principle of lex mitior, according to which, among different laws that have followed one another, the one whose provisions are overall more favorable to the offender must be applied. The interpretive challenge was to determine whether the repeal of the 2017 suspension should be considered an isolated favorable event or whether it should be read in the context of a new system which, by blocking prescription permanently, is paradoxically more severe for the defendant.
What case law says
The case law of legitimacy has clarified that the prescription regime must be evaluated as a unitary block. The United Sections have established that the suspension regime provided by the 2017 reform continues to apply to crimes committed during its period of validity because the subsequent system, while no longer having those suspensions, provides for a total block of the term's progress which would anyway prevent prescription in subsequent stages. Therefore, the 2017 regime remains the most favorable possible for those who committed the act between 2017 and 2019, as it ensures that prescription continues to run, albeit with eighteen-month pauses.
The Constitutional Court confirmed this approach, specifying that there is no violation of the principle of legality or equality. According to reports in the specialized press, the Court observed that the legislator can differentiate temporal regimes as long as there is a rational justification linked to the transition between systemic reforms. In this journalistic view, the absence of this survival would lead to an unreasonable regulatory void, leading to the indiscriminate prescription of serious crimes just because of a technicality related to the timing of the repeal, betraying the purpose of judicial efficiency.
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What it teaches professionals
- The evaluation of lex mitior must be carried out in concrete and globally, comparing entire regulatory systems and not single isolated provisions.
- It is essential to verify the date of the crime with millimeter precision, as a difference of a few days between 2019 and 2020 determines the transition between the ordinary prescription regime and that of improcedibility.
- One must not rely on the formal repeal of a rule if it is part of a system reform that provides for its replacement with more burdensome institutions.
- Strategic management of trial timing requires deep knowledge of transitional rules to avoid unfounded prescription exceptions that could unnecessarily accelerate the judgment.
References: Sentenza 38/2026 della Corte CostituzionaleRiforma del 2021Disciplina del 2017Codice PenaleSistema PenaleDiritto e Giustizia
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Frequently asked questions
What happens to crimes committed between 2017 and 2019 if the trial lasts a long time?
The eighteen-month suspension after the first-instance conviction provided by the 2017 reform still applies, even though that law is now repealed, lengthening the time for prescription.
Can the 2021 reform be applied retroactively to shorten prescription?
No, because the 2021 reform introduces a total block of prescription after the first instance, which is considered a less favorable regime than the old prescription with suspensions.
How is it calculated if a 2018 crime is time-barred?
One must add to the basic term of the crime both the ordinary interruptions and the eighteen months of suspension accrued after the first-instance sentence, as established by the United Sections.
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