The obligations of gatekeepers should only be updated after a thorough investigation into the nature and impact of specific practices that may be newly identified, following an in-depth investigation, as unfair or limiting contestability in the same manner as the unfair practices laid down in this Regulation while potentially escaping the scope of the current set of obligations. The Commission should be able to launch an investigation with a view to determining whether the existing obligations need to be updated, either on its own initiative or following a justified request of at least three Member States. When presenting such justified requests, it should be possible for Member States to include information on newly introduced offers of products, services, software or features which raise concerns of contestability or fairness, whether implemented in the context of existing core platform services or otherwise. Where, following a market investigation, the Commission deems it necessary to modify essential elements of this Regulation, such as the inclusion of new obligations that depart from the same contestability or fairness issues addressed by this Regulation, the Commission should advance a proposal to amend this Regulation.