Story highlights The ban will bar a subset of foreign nationals from six majority-Muslim countries with no connection to the US

The Supreme Court will hear legal challenge to the ban this fall

Washington (CNN) After months of winding through the courts, the so-called "watered-down," revised version of President Donald Trump's fiercely litigated travel ban finally went into effect at 8 p.m. ET Thursday.

Less than an hour before the ban was slated to begin, an emergency motion was filed in federal court by the state of Hawaii, which contests the Trump administration's plan to exclude certain categories of foreign nationals that the state believes are allowed to enter the country under existing court rulings.

Here's what to expect for the implementation of version 2.0 of the travel ban:

Who can't enter the US?

The test for foreign nationals under the Supreme Court's ruling is whether one has a "credible claim of bona fide relationship" with either an entity (like a school or a job) or a person living in the US (such as a spouse).

Read More