Now think about how many “birds” you’ve seen that were walking or resting instead of flying. The system takes cost-effectiveness into consideration.
183 days. You self-declare unless the government has a reason to audit. This is a solved problem already and we’ve been going by these standards for decades.
It’s called establishing a domicile in tax terminology.
The West has been doing that for the past year and a half already. It’s not like putting undertrained Ukranian pilots in F-22s against Russian SAMs will affect the outcome of the war drastically.
Fast-travel