From 1 December 2020, the procedure for submitting a declaration of local feasibility for medical research will be modified. In the new procedure, the current Research Declaration has been replaced by the Site Suitability Declaration (Verklaring Geschiktheid Onderzoeksinstelling, VGO). To switch from the current procedure to new procedure a transitional period from December 1, 2020 till June 1, 2021 is foreseen. During this period, sponsors will be able to choose either to submit the VGO or the current Research Declaration for the assessment of the suitability of the participating centres. As of 1 June 2021, use of the VGO will become mandatory.