Istanbul, June 19 () - EU ambassadors endorsed, on behalf of the Council, a mandate for negotiations on a proposal amending the Schengen border code as regards temporary reintroduction of controls at internal borders. According to a statement made by European Council, on the basis of this mandate, the Council Presidency will start negotiations with the European Parliament once the latter has adopted its position. This proposal aims to provide increased flexibility for member states to address serious threats to public policy or internal security and, on the other hand, to ensure that the reintroduction of internal border controls is only used as a last-resort. "The Schengen area has brought uncontested benefits to people across Europe. Today's agreement aims to preserve these achievements. It will provide member states with the necessary tools to respond to the evolving security challenges they face while ensuring the proportionality of this response" Valentin Radev, Bulgarian Minister of Interior. To address serious threats to public policy or internal security, the proposed amendment would allow to reintroduce internal border controls under the same reason for a total period of no longer than one year. The amendment would also include a series of safeguards which should be met in order to ensure the proportionality and necessity of these measures, including a risk assessment and consultation mechanisms. According to the statement, when border controls at internal borders are carried out for more than six months, the Commission shall issue an opinion.