(7)One of the main principles underlying the amendment of Regulation (EU) 2017/2402 by Regulation (EU) 2021/557 was to ensure a high degree of consistency between the STS requirements for on-balance-sheet STS securitisations and the already existing STS requirements for ABCP and non-ABCP securitisations. It follows that rules for determining the homogeneity of the underlying exposures in on-balance-sheet STS securitisations should be aligned as much as possible with the rules that already exist for ABCP and non-ABCP STS securitisations. To facilitate a comprehensive assessment of all rules for determining the homogeneity of underlying exposures, and to provide easy access to those rules to the parties subject to the corresponding obligations, it is necessary to combine the regulatory technical standards on homogeneity for non-ABCP, ABCP and on-balance-sheet STS securitisations in a single Regulation.