When considering whether there is a need to ensure or enhance interoperability between differing technical formats or process and messaging standards by rendering the use of specific standards mandatory, and if so which standards to impose, the Commission should take the utmost account of the opinions of the stakeholders concerned. It should also consider the extent to which a given standard has already been used in practice by economic operators and contracting authorities and how well it has worked. Before making the use of any particular technical standard mandatory, the Commission should also carefully consider the costs that this might entail, in particular in terms of adaptations to existing e-procurement solutions, including infrastructure, processes or software. Where the standards concerned are not developed by an international, European or national standardisation organisation, they should meet the requirements applicable to ICT standards as set out in Regulation (EU) 1025/2012 of the European Parliament and of the Council ( 12 ).) .