Is he saying that anyone who adopts Islám would be legally required to inform the state of this? At what age would he be considered able to adopt Islám independently of his parents' consent? 12? 15? I'm assuming anyone who has reached the age of free consent a and adopts Islám would have to register?
What if a person leaves Islám? Would he too be required to inform the authorities to have his name removed?
I know Irán and Israel officially register a person's professed faith and conversions. Trump really wants to go down that path?