1. The Commission may conduct a market investigation for the purpose of examining whether a gatekeeper has engaged in systematic non-compliance. The Commission shall conclude that market investigation within 12 months from the date referred to in Article 16(3), point (a). Where the market investigation shows that a gatekeeper has systematically infringed one or more of the obligations laid down in Article 5, 6 or 7 and has maintained, strengthened or extended its gatekeeper position in relation to the requirements set out in Article 3(1), the Commission may adopt an implementing act imposing on such gatekeeper any behavioural or structural remedies which are proportionate and necessary to ensure effective compliance with this Regulation. That implementing act shall be adopted in accordance with the advisory procedure referred to in Article 50(2).