(2)Regulation (EU) 2024/1623 amended Article 138 of Regulation (EU) No 575/2013 by adding a requirement, applicable from 1 January 2025, that, for the purposes of using the standardised approach for calculating risk-weighted exposure amounts in relation to exposures to institutions, an institution must not use an external credit assessment institution (ECAI) credit assessment that incorporates assumptions of implicit government support, except where it refers to an institution owned by or set up and sponsored by central governments, regional governments or local authorities. The amended Article 138 provides further that where the only ECAI credit assessments that exist for an institution not falling within the excepted category of institutions are ECAI credit assessments that incorporate such assumptions of implicit government support, exposures to such an institution must be treated as exposures to an unrated institution, in accordance with Article 121 of Regulation (EU) No 575/2013.