180天規定指的是break in residence for naturalization....

There is a rebuttal presumption that one breaks continuity in residence (5 or 3 years) for naturalization. If there is a break, there comes in the 4 years and 1 day rule. 

所有跟帖： 

• 很多人不信我们看条文讲道理，来问的最希望听到的是anecdotal evidence，好比信中医一样。 -柠檬椰子汁- ♂ (0 bytes) () 05/11/2022 postreply 19:28:24

• 你说的很有道理。只不过海关不是永远跟你讲道理的，只要让他们怀疑，完全可以先没收绿卡，就算投诉得直，也是费时失事。 -原上草2017- ♂ (302 bytes) () 05/13/2022 postreply 09:58:41