(40)The enforcement challenges that exist go beyond the frontiers of the Union, and the interests of Union consumers need to be protected from rogue traders based in third countries. Hence, international agreements with third countries regarding mutual assistance in the enforcement of Union laws that protect consumers’ interests should be negotiated. Those international agreements should include the subject matter laid down in this Regulation and should be negotiated at Union level in order to ensure the optimum protection of Union consumers and smooth cooperation with third countries.