According to Article 128(1) of Regulation (EU) No. 575/2013 (CRR), where appropriate, institutions shall assign a 150 % risk weight to exposures that are associated with particularly high risks which are either listed in Article 128(2) or meet the criteria of Article 128(3). Consequently, these shall not be allocated to any other class of exposure, not even "in default" under Article 127, regardless of whether these exposures are securitised by collateral. Exposure types listed in Article 128 (2) and (3) are considered as having particular high risk and transferring these into other exposure classes with lower risk weights would undermine applying appropriate risk weights to cover unexpected losses related to these high risk items.
This question goes beyond matters of consistent and effective application of the regulatory framework. A Directorate General of the Commission (Directorate General for Internal Market and Services) has prepared the answer, albeit that only the Court of Justice of the European Union can provide definitive interpretations of EU legislation. This is an unofficial opinion of that Directorate General, which the European Banking Authority publishes on its behalf. The answers are not binding on the European Commission as an institution. You should be aware that the European Commission could adopt a position different from the one expressed in such Q&As, for instance in infringement proceedings or after a detailed examination of a specific case or on the basis of any new legal or factual elements that may have been brought to its attention.