mechanism at which vs mechanism in which

Some examples from the web:

• We need additional strengthened control mechanisms at country level which will decrease the risk of misappropriation of the funds and can then resume payment.
• The authorisation of qualified entities would provide Member States with a mechanism at hand which would allow for some control of the representative organisation and consequently of the horizontal instrument against misuse while this control would not exist in the case of a group action.
• The EU is working urgently to develop such a mechanism which aims at contributing to meet basic needs including health services.
• Indeed, France and Germany made this point at the New York climate summit on 22 September 2009 when they asked for the creation of a mechanism at Europe's borders which would financially penalise the worst polluting countries.
• Suggests that the Commission take account of the unique transition-related reform experiences of the Member States which have joined the EU in the 21 century so as to elaborate on the new mechanisms at work which may be beneficial to Montenegro;
• Suggests that the Commission take account of the unique transition-related reform experiences of the Member States which have joined the EU in the 21 century, so as to build on the new mechanisms at work which may be beneficial to Montenegro;
• However, if options are proposed by Sofia, Cotonou, Santiago, Brussels, the debates in Geneva are the mechanism to arrive at agreements which should increasingly remove barriers.
• Within this one year, from last May until today, we have created effective stability mechanisms which were at first temporary and which will then become permanent as of 2013.
• What is being transferred is the Petersberg tasks alone, with of course the institutional and administrative mechanisms which are at the disposal of the European Union.
• The other half of the wage gap, however, cannot be explained objectively and seems to suggest that there are hidden mechanisms of discrimination at play which lead to the undervaluing of female-dominated jobs and professions.
• Are these not the very mechanisms which are at the root of the problem?
• it has in place a Complaints Mechanism Policy which aims at providing members of the public with an institutional procedure, internal to the EIB, for the handling of complaints.
• There are various cooperation mechanisms at EU level.
• The Agency shall coordinate the national energy crisis management mechanisms at the Community level.
• We must set up mechanisms at EU level to ensure that best practice is shared more effectively.
• We have defined and agreed on financial mechanisms at the European level.
• But we understand why members of the euro area opted for an intergovernmental mechanism at this stage.
• Subject: Gender equality institutional mechanisms at EU level
• The Commission already suggested the introduction of a feedback mechanism at the SCAC meeting of December 2006.
• The Agency shall coordinate the national energy crisis management mechanisms at Community level.

Some examples from the web:

• That is why we should support a mechanism in which all interested parties in the course of choosing a standard are clearly aware of the advantages and disadvantages of one invention or another and of the price they will pay for using the patent.
• Such review does not entail the obligation for Member States to provide for a separate mechanism in which the sole ground for review is the challenging of such finding.
• Consequently, the risk of the state being called upon should fall to zero as from the end of 2008/beginning of 2009, as against the end of 2011/beginning of 2012 under the previous mechanism in which the state's counter-guarantee did not enjoy any priority amortisation.
• Also the arbitration mechanism in place which requires the new entity to receive all necessary inclusions for ensuring its viability will ensure the compliance of ING with its commitments under this Decision.
• To this end, EFTA States shall have appropriate mechanisms in place which allow assessing any potential complaint in an effective way at the national level.
• The Soviet plans, however, were designed to build up the economy, whereas the European budgetary plans are balancing mechanisms in which flies' eggs are weighed on spiders' webs.
• There is no mechanism in the Charter Fund which would discriminate against Norwegian carriers.
• It became clear in recent weeks how difficult it is to put a mechanism in place with which we can help each other out.
• My country has suggested entering the exchange rate mechanism in 2012, which is actually the phase prior to entering the euro area.
• The EU has been supporting the UN monitoring mechanisms in the countries which were listed in the annexes of the SG report in previous years.
• For example, such differences may reflect inappropriate national economic policies, structural rigidities or malfunctioning adjustment mechanisms in individual countries, which should be addressed by national policy-makers.
• Could we not consider that in both mechanisms in Euro Plus, which is an obligational commitment to observe certain rules of behaviour in macroeconomic and macro-financial policy, and also in ESM.
• The mechanism by which Rebetol in combination with interferon alfa-2b exerts its effects against HCV is unknown.
• The resolution says "the credibility of the UNHRC rests on the implementation of these reforms and mechanisms in a way which will strengthen its ability to address human rights violations around the world".
• I assume that the Commission will propose a mechanism in the plan which will relieve parents of the burden of paying for the collection and subsequent storage of cord blood.
• whereas the credibility of the HRC rests on the adoption of these reforms and mechanisms in a way which will strengthen its ability to address human rights violations around the world,
• Sufficient mechanisms are already in place which would enable EU Member States to speak with one voice in dealing with Russia, should we so wish.
• As regards the specific management of agencies, as you know, these have their own supervision mechanisms which, in my view, are pretty rigorous.
• Some other countries, in particular China and Russia, have expressed interest in this mechanism which will facilitate detecting counterfeit medical devices at international level.
• Can the Commission indicate if it has any knowledge of existing mechanisms in the Member States which assist their SMUs financially or legally and/or administratively in the patenting procedure?