Updated April 09, 2016. The Royal Road of the Achaemenids was a major intercontinental thoroughfare built by the Achaemenid king Darius the Great (521-485 BC), to allow access to the conquered cities throughout the Persian empire. It is also, ironically enough, the same road that Alexander the Great used to conquer the Achaemenid dynasty a century and a half later.
Adult Certification (ages 16 and up) Minnesota requires snowmobile certification by law for anyone born after December 31, 1976. Adult snowmobile safety certification is for snowmobile operators age 16 and over. Complete one of the online courses: snowmobile-ed.com (fee for the course is $29.50) or.
1 Children younger than 5 years of age are unable to travel as unaccompanied minors, even if they are flying with an older unaccompanied child.  Unaccompanied minor service is not available for children ages 16 and older. Young adults ages 16 and 17 may travel alone on any United- or United Express-operated flight.