The services in the digital sector and the types of practices relating to these services can change quickly and to a significant extent. To ensure that this Regulation remains up to date and constitutes an effective and holistic regulatory response to the problems posed by gatekeepers, it is important to provide for a regular review of the lists of core platform services, as well as of the obligations provided for in this Regulation. This is particularly important to ensure that a practice that is likely to limit the contestability of core platform services or is unfair is identified. While it is important to conduct a review on a regular basis, given the dynamically changing nature of the digital sector, in order to ensure legal certainty as to the regulatory conditions, any reviews should be conducted within a reasonable and appropriate timeframe. Market investigations should also ensure that the Commission has a solid evidentiary basis on which it can assess whether it should propose to amend this Regulation in order to review, expand, or further detail, the lists of core platform services. They should equally ensure that the Commission has a solid evidentiary basis on which it can assess whether it should propose to amend the obligations laid down in this Regulation or whether it should adopt a delegated act updating such obligations.