(7)The requirement to obtain two credit assessments from nominated external credit assessment institutions (ECAIs) is in general justified by the complexity of assessing in a reliable manner the credit risk of securitisation positions. However, securitisations meeting the criteria of simplicity, transparency and standardisation (STS) are subject to a specific regulatory framework designed to ensure comparability and to reduce information asymmetries. For that reason, and to support the Union’s efforts to address unjustified administrative and compliance costs, it is appropriate to lift the double-rating requirement for STS securitisations, while maintaining it for other securitisations.