Member States should assess applications in a border procedure where the applicant is a danger to national security or public order, where the applicant, after having been provided with the full opportunity to show good cause, is considered to have intentionally misled the authorities by presenting false information or documents or by withholding relevant information or documents with respect to his or her identity or nationality that could have had a negative impact on the decision and where it is likely that the application is unfounded because the applicant is of a nationality for whom the proportion of decisions granting international protection is 20 % or lower of the total number of decisions for that third country. In order to ensure uniform conditions for the implementation of Article 50, third paragraph, of this Regulation, implementing powers should be conferred on the Commission. In other cases, such as when the applicant is from a safe country of origin or a safe third country, the use of the border procedure should be optional for the Member States.