In order to ensure contestable and fair markets in the digital sector across the Union where gatekeepers are present, the power to adopt acts in accordance with Article 290 TFEU should be delegated to the Commission in respect of amending the methodology for determining whether the quantitative thresholds regarding active end users and active business users for the designation of gatekeepers are met, which is contained in an Annex to this Regulation, in respect of further specifying the additional elements of the methodology not falling in that Annex for determining whether the quantitative thresholds regarding the designation of gatekeepers are met, and in respect of supplementing the existing obligations laid down in this Regulation where, based on a market investigation, the Commission has identified the need for updating the obligations addressing practices that limit the contestability of core platform services or are unfair, and the update considered falls within the scope of the empowerment set out for such delegated acts in this Regulation.