Trump travel ban: US sets out visa criteria for mainly six Muslim countries

WASHINGTON - The White House has set new criteria for visa applicants from six mainly Muslim countries and all refugees, requiring them to have a "close" family or business tie to the US.

The rules, affecting people from Iran, Libya, Syria, Somalia, Sudan and Yemen, come into force on Thursday.

They were issued after the Supreme Court partially restored President Donald Trump's travel ban.

The controversial executive order had been blocked by lower courts.

According to the new rules, confirmed to the BBC, for the next 90 days those without a close relationship - defined as a parent, spouse, child, son or daughter-in-law, or sibling - will not be able to enter the US.

The definition of "close" relationships excludes grandparents, aunts, uncles, nieces, nephews, in-laws, extended family and grandchildren.

Also exempt from the new rules are those with business or educational ties to the United States.

However, the guidelines specifically state that the relationship must be formal, documented and formed in ordinary course, rather than for the purpose of evading the executive order.

Those who already hold valid visas are not affected. Dual nationals who travel on their passport from the unaffected country will also be allowed entry.

However, lawyers both for and against the ban have warned that the new restrictions - which will remain in place until the Supreme Court issues a final ruling - could open the door to a flood of legal challenges.

But the Supreme Court will not be reviewing the case until October - which will mean the 90-day period will be largely done.