Article 259 Description Calculation of risk-weighted exposure amounts under the SEC-IRBA Links Question & Answers Source EUR-Lex Question & Answers Paragraph 3 Links 2019_4500 Requirements for the usability of an ECAI within the framework of the Internal Assessment Approach pursuant to Article 259(3) of Regulation (EU) No 575/2013 – before amendments introduced by Regulation (EU) No. 2017/2401 - and Article 265 R