From page 8 of the
EXP Member Guide booklet:
Benefits of Emerald status include access on the day of travel to the First Class and Business Class
lounges of all oneworld airlines when you are traveling internationally,* as long as your continuing
flight is marketed and operated by a oneworld airline.
*Lounge access is not available when travel is wholly within the U.S., Canada, Mexico (except Mexico City),
Bermuda, The Bahamas, and the Caribbean.