Please cite the principle of international law which requires the present day iteration of a state's government to have had past administration of a breakaway territory in order to assert a claim of ownership over said territory.
Please also cite any supporting state practice and opinio juris.
The truth, like it or not, is that PRC has never, ever seized control of Taiwan. Hopefully it never does. This is not pedantry.
Please cite the principle of international law which requires the present day iteration of a state's government to have had past administration of a breakaway territory in order to assert a claim of ownership over said territory.
Please also cite any supporting state practice and opinio juris.