In a situation of crisis characterised by mass arrivals of third-country nationals and stateless persons applying for international protection, it could be necessary to allow a Member State to lower the threshold for the mandatory application of the border procedure provided for in Article 42(1), point (j), of . In any event, the reduced threshold should not go below 5 %. Member States are obliged to apply the border procedure in the situations referred to in Article 42(1), points (c) and (f), of that Regulation.