Oh, this is such a thoughtful concern and I really respect that you are thinking so carefully about your little one's future benefits even before bersalin lagi! From what I understand, the IC negeri follows where the child is registered or born, so it is worth checking with JPN directly to confirm how it works for your situation specifically. Maybe you can also call the Selangor welfare office to ask whether Selangor bantuan eligibility is based on parents' IC or the child's, that way you can make a more informed decision between HTAR and PPUM, dear.