Mechanism for Cooperation and Verification
The Mechanism for Cooperation and Verification (CVM) is safeguard measure invoked by the European Commission when a new member or acceding state of the European Union has failed to implement commitments undertaken in the context of the accession negotiations in the fields of the Area of freedom, security and justice or internal market policy.
Common practice in the EU is that during accession negotiations there are agreed some temporary transitional periods after accession of new states for derogation of application for specific parts of the acquis communautaire, because of difficulties either for the new member state (for example environmental regulations for large combustion plants) or for the old member states (for example free movement of workers). Such temporary transitional periods in regards to particular member states are also implemented when various new pieces of EU legislation are adopted .
In some cases the derogation is not temporary, but permanent. Such derogations could be one of the major Opt-outs in the European Union (formulated in a treaty) or some minor derogations like the exemption of Sweden from the snus ban (formulated in EU legislation).
Both an opt-out and an CVM constitute a suspension of the application of relevant provisions of EU law in regards to a particular member state, but in contrast to the opt-outs, that are established on initiative of the state concerned, the CVM is established on initiative of the Commission.
In contrast to the temporary derogations, that are automatically discontinued after the end of the transitional period, the Mechanism for Cooperation and Verification is permanent and its discontinuation is conditional only on the positive assessment of benchmarks fulfillment in the regular reports issued by the Commission. This is similar to the permanent derogations on Eurozone and Schengen Area for new member states (formulated in accession treaties), whose discontinuation is also conditional the on fulfillment of benchmarks (like the convergence criteria) and similarly assessed in regular progress reports. According to the treaties the new member states are obliged to fulfill the benchmarks for discontinuation of both these permanent derogations and the CVMs, but some of them deliberately delay these processes. The CVM is thus different from the Enhanced co-operation mechanism, where generally all EU members are free to opt-in at any time into an already established Enhanced co-operation initiative, without preconditions.
Legal base 
The accession treaties include provisions such as:
If [the acceding state] has failed to implement commitments undertaken in the context of the accession negotiations, causing a serious breach of the functioning of the internal market, ..., the Commission may, until the end of a period of up to three years after accession, ..., take appropriate measures. ... The safeguard clause may be invoked even before accession ... The measures ... shall be lifted when the relevant commitment is implemented. They may however be applied beyond the period [of three years after accession] as long as the relevant commitments have not been fulfilled.
If there are serious shortcomings ... in [the acceding state] in the transposition [of Acquis communautaire] relating to mutual recognition in the area of criminal law ...and ... civil matters ..., the Commission may, until the end of a period of up to three years after accession, ..., take appropriate measures. ... These measures may take the form of temporary suspension of the application of relevant provisions ... in the relations between the acceding state and any other Member State ... The safeguard clause may be invoked even before accession ... The measures ... shall be lifted when the shortcomings are remedied. They may however be applied beyond the period [of three years after accession] as long as these shortcomings persist.
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The internal market safeguard clause has not been invoked so far. The safeguard clause for criminal law and civil matters was invoked  in regards to the countries of the 2007 enlargement.
On 13 December 2006 the Commission established the following mechanisms for cooperation and verification of progress:
- for Romania to address specific benchmarks in the areas of judicial reform and the fight against corruption
- for Bulgaria to address specific benchmarks in the areas of judicial reform and the fight against corruption and organised crime
These measures entered into force as of the first day of accession, 1.1.2007.
The Commission assessed that "When they joined the EU on 1 January 2007, Romania and Bulgaria still had progress to make in the fields of judicial reform, corruption and organised crime. To smooth the entry of both countries and at the same time safeguard the workings of its policies and institutions, the EU decided to establish a special "cooperation and verification mechanism" to help them address these outstanding shortcomings."
The Commission issues reports under the Cooperation and Verification Mechanism every 6 months on progress with judicial reform, the fight against corruption and, concerning Bulgaria, the fight against organised crime.
So far, no suspensions are enforced, but the possibility for those is stated in paragraph 7 of the decisions for CVM establishment from 2006.
Benchmarks for Romania 
- Ensure a more transparent, and efficient judicial process notably by enhancing the capacity and accountability of the Superior Council of Magistracy. Report and monitor the impact of the new civil and penal procedures codes.
- Establish, as foreseen, an integrity agency with responsibilities for verifying assets, incompatibilities and potential conflicts of interest, and for issuing mandatory decisions on the basis of which dissuasive sanctions can be taken.
- Building on progress already made, continue to conduct professional, non-partisan investigations into allegations of high-level corruption.
- Take further measures to prevent and fight against corruption, in particular within the local government.
Benchmarks for Bulgaria 
- Adopt constitutional amendments removing any ambiguity regarding the independence and accountability of the judicial system.
- Ensure a more transparent and efficient judicial process by adopting and implementing a new judicial system act and the new civil procedure code. Report on the impact of these new laws and of the penal and administrative procedure codes, notably on the pre-trial phase.
- Continue the reform of the judiciary in order to enhance professionalism, accountability and efficiency. Evaluate the impact of this reform and publish the results annually.
- Conduct and report on professional, non-partisan investigations into allegations of high-level corruption. Report on internal inspections of public institutions and on the publication of assets of high-level officials.
- Take further measures to prevent and fight corruption, in particular at the borders and within local government.
- Implement a strategy to fight organised crime, focussing on serious crime, money laundering as well as on the systematic confiscation of assets of criminals. Report on new and ongoing investigations, indictments and convictions in these areas.
|country||permanent acquis suspension conditional on benchmarks to be met by member state|
|Schengen Area||EMU||Criminal law
|Bulgaria||suspension only potential||suspension only potential|
|Romania||suspension only potential||suspension only potential|
Future usage 
More than three years has passed since the last enlargement so as of 2011 no new safeguards can be invoked.
See also 
- Results of the accession negotiations with Croatia
- The latest end dates of transitional measures are the following:
Treaty of Accession 2011: 2024 for Croatia;
Treaty of Accession 2005: 2018 for Romania and 2014 for Bulgaria;
Treaty of Accession 2003: 2017 for Poland, various earlier dates for the rest of the signatories;
Acts of Accession 1994: Austria, Finland, Sweden;
Acts of Accession 1985: Portugal, Spain;
Acts of Accession 1979: Greece;
Acts of Accession 1972: Denmark, Ireland, United Kingdom.
- For example Sweden in regards to Euro adoption.
- A procedure by witch some EU member states are allowed to establish advanced integration or cooperation in an area within EU structures but without the other members being involved.
- Act of Accession of Bulgaria and Romania
- Romania CVM
- Bulgaria CVM
- EURACTIV - Croatia