The State Department has ordered American embassies and consulates around the world to draw up criteria for "population sets" needing extra scrutiny before receiving visas to travel to the United States, according to a recent diplomatic cable.
The message also instructed US posts overseas to review the social media accounts of visa applicants who are suspected of terrorist ties or of having been in Islamic State group-controlled areas.
The guidance was sent in a March 17 cable to all US diplomatic missions to help American officials satisfy President Donald Trump's memorandum for enhanced vetting of visa applicants.
The Associated Press obtained a copy of the cable. The State Department wouldn't comment beyond saying it was working to meet the Trump memorandum's requirements and that "visitor screening and vetting procedures are designed to effectively identify individuals who could pose a threat to the United States."
The cable, which was first reported by Reuters, does not define "population sets." But it quickly drew criticism from rights groups and others who've accused Trump of discriminating against Muslims through his now-suspended ban on travellers from six predominantly Muslim countries.
The cable calls for consular chiefs at each post to immediately convene working groups to "develop a list of criteria identifying sets of post applicant populations warranting increased scrutiny" and "attempt to identify individual applicants that fall within the population set during the course of a consular visa interview." Even if the applicant otherwise qualifies for a visa, those identified as meeting the criteria would require additional scrutiny and possible denial.
Amnesty International on Friday called for the department to publicise the guidance.
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"These measures could provide license for discrimination based on national origin and religion," the human rights group said in a letter to Secretary of State Rex Tillerson.
"They could provide a pretext for barring individuals based on their nonviolent beliefs and expression. Social media checks, as well as demands for social media passwords at US borders, have significant implications for privacy and freedom of expression," the group said.
The instructions tells posts to refer any visa applicant who "may have ties to ISIS or to other terrorist organisations or has ever been present in an ISIS-controlled territory" to a Fraud Prevent Unit for a mandatory social media review.
The results of that review are to be flagged and entered into the applicant's file.
Additionally, the cable says consular officers must take into account if an Iraqi visa applicant "was ever present in a territory at the time it was controlled by ISIS." If the applicant was, such information must be flagged for additional review.
The Trump administration originally included Iraq among the countries affected by its proposed travel ban. After a court blocked the effort, a second executive order removed Iraq from the travel ban. That order also has been suspended by a court.
The cable anticipates the new requirements may cause backlogs in visa processing.