Article 15 3.

justification of the upgrade;

compatibility with the original EuroHPC supercomputer;

increase in operational capacity performance of the EuroHPC supercomputer;

provision of an appropriate supporting document proving the commitment of the Member State where the hosting entity is established or of the competent authorities of the Participating States of the hosting consortium to cover the share of the upgrading cost of the EuroHPC supercomputer that is not covered by the Union contribution as set out in Article 5 or any other Union contribution as set out in Article 6, either until its ownership is transferred by the Joint Undertaking to that hosting entity or until the supercomputer is sold or decommissioned if there is no transfer of ownership.