(62)In order to foster the free movement of services, Member States should allow independent assurance services providers established in a different Member State to carry out the assurance of sustainability reporting in their territory. This would also favour opening up the assurance market even when not all Member States allow for the accreditation of independent assurance services providers in their territory. Where independent assurance services providers carry out the assurance of sustainability reporting in the territory of a host Member State, that host Member State should be able to decide to supervise independent assurance services providers, given the possibility to leverage on the implemented framework for the supervision of auditors carrying out the assurance of sustainability reporting.