> In theory some random rogue state (Hello North Korea!), can just grant all of the Australian parliament citizenship. Suddenly they're all ineligible under the constitution.
It's funny how Russia, of all the countries, had this problem - there are a lot of immigrants from ex-USSR countries, and some of these countries make it very hard to relinquish citizenship. For example in Ukraine this is done only by a presidential order, after a long bureaucratic procedure, and the last such order was signed in 2021. So Russia had to invent a mechanism which allows to write an affidavit certifying you would not exercise any rights given to you by foreign citizenship, and with such an affidavit your citizenship is considered "effectively relinquished" by Russian authorities.
It's funny how Russia, of all the countries, had this problem - there are a lot of immigrants from ex-USSR countries, and some of these countries make it very hard to relinquish citizenship. For example in Ukraine this is done only by a presidential order, after a long bureaucratic procedure, and the last such order was signed in 2021. So Russia had to invent a mechanism which allows to write an affidavit certifying you would not exercise any rights given to you by foreign citizenship, and with such an affidavit your citizenship is considered "effectively relinquished" by Russian authorities.