Nearly every jurisdiction on earth has rules about who can marry whom. Especially when it comes to immigration. My best friend's fiance had to return to her home country from their shared second for 8 months while she applied for another visa to allow them to legally change her status when she married.

I feel like it's really strange that HN commenters hate on Singapore for having standards for immigrants. To the point of lying and saying that Work Permit holders aren't allowed to marry citizens in order to drum up outrage, and only backtracking when called out on it.