Aspiring member states of the European Union could face special post-accession safeguards lasting up to 15 years, including the possible suspension of Council voting rights, under proposals intended to prevent countries reversing democratic and rule-of-law reforms after joining.

The European Commission has proposed a new system of safeguards for future EU members that could remain available for up to 15 years after accession, allowing Brussels to respond if a newly admitted country abandons commitments on democracy, the rule of law or cooperation with the Union.

The proposals form part of the Commission’s new package on preparing the EU for enlargement and are directly relevant to candidate countries including Ukraine, Moldova, Albania and Montenegro.

Under the framework, existing safeguards covering the economy, the internal market and justice and home affairs would remain available for substantially longer after accession.

A separate institutional mechanism would address serious breaches of the fundamental values contained in Article 2 of the EU Treaty or of the principle of sincere cooperation, according to the Commission’s enlargement package.

In the most serious cases, voting rights in the Council could be suspended.

Reporting on the proposal indicates that the exceptional framework could apply for up to 15 years following a country’s entry into the Union. The Commission describes the proposed measures as temporary, targeted and reversible rather than a permanent second tier of membership.

The plan addresses a problem that has become increasingly prominent in the enlargement debate: the EU has considerably greater influence over political and judicial reforms while a country is negotiating membership than after it has joined.

Candidate governments must meet detailed conditions to open and close negotiating chapters. Once membership is obtained, sanctioning a government for democratic backsliding becomes considerably more difficult because many EU decisions require unanimity or large qualified majorities.

The Commission is therefore seeking to build additional guarantees into future accession treaties.

President Ursula von der Leyen described enlargement as a “geopolitical imperative” when presenting the package on Tuesday. Enlargement Commissioner Marta Kos said the EU could accommodate additional countries but needed stronger instruments to protect the rule of law and ensure that new members continued to honour commitments made during negotiations.

The proposal goes beyond voting rights. Transitional arrangements could be applied to the free movement of workers and services, agriculture, sensitive products, EU funding and participation in common European systems.

The Commission has also proposed targeted arrangements for incorporating Ukraine’s large agricultural sector into the Common Agricultural Policy, reflecting concern among existing member states about the potential budgetary and market consequences of Ukrainian accession.

At the same time, Brussels is offering candidate states deeper integration before full membership. EU Today reported recently on plans to give Ukraine and Moldova wider access to parts of the Single Market, research programmes and industrial cooperation before accession.

The new safeguard proposal adds the other side of that equation: earlier integration would be accompanied by stronger mechanisms to ensure reforms are not reversed after membership is achieved.

The Commission argues that the mechanisms would supplement, rather than replace, rules applying to all EU members. None of the proposed changes automatically brings membership closer. Accession remains dependent on the individual performance of candidate states and requires the approval of the existing member states.

The debate will now move to national governments and the European Parliament, with the 15-year safeguard likely to be among its most contested elements.