1. The Commission may conduct a market investigation for the purpose of examining whether an undertaking providing core platform services should be designated as a gatekeeper pursuant to Article 3(8), or in order to identify the core platform services to be listed in the designation decision pursuant to Article 3(9). The Commission shall endeavour to conclude its market investigation within 12 months from the date referred to in Article 16(3), point (a), In order to conclude its market investigation, the Commission shall adopt an implementing act setting out its decision. That implementing act shall be adopted in accordance with the advisory procedure referred to in Article 50(2).