You do not have to be a "US Citizen" to live in the United States but you do have to have some form of legal status to be legally resident. Those alternative forms of legal status may include:
LPR / "Green Card" Holder ("Permanent" Residency)
Student Visa Holder ("Temporary" Residency)
Visitor ("Temporary" Residency) - either via Visa or subject to the VWP
Business Visitor ("Temporary" Residency)
Temporary Work Visa - under various classes ("Temporary" Residency)
"Dual-Intent" Work Visas (H-Class Visa) ("Temporary" Residency)
Refugee / Asylee
and other classes applicable to certain immigrants
You do not have to be a "US Citizen" to live in the United States but you do have to have some form of legal status to be legally resident. Those alternative forms of legal status may include:
LPR / "Green Card" Holder ("Permanent" Residency)
Student Visa Holder ("Temporary" Residency)
Visitor ("Temporary" Residency) - either via Visa or subject to the VWP
Business Visitor ("Temporary" Residency)
Temporary Work Visa - under various classes ("Temporary" Residency)
"Dual-Intent" Work Visas (H-Class Visa) ("Temporary" Residency)
Refugee / Asylee
and other classes applicable to certain immigrants
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The decision always is to be made by the officials at the point
of entry.
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You must if you are a Temporary Permit Holder, or first-year
endorsed operator
or a passenger, and during the test. Please check the details in
the motorcycle manual (related link).
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Yes, you will normally need a visa (and a Certificate of
Sponsorship) to go to the UK to work.
However, if you are going as a work permit holder for 6 months
or less, or as a Temporary Worker in the Creative and Sporting
Category of PBS Tier 5 or for less than 3 months, you will not
require a visa.