Says nothing about ‘natural born citizenship’. One can be a us citizen and still not be a ‘natural born US citizen. I will note like the devil courted Eve in the garden the players that wrote this left out the difference in ‘natural born’ citizenship, and citizenship attained from having been born on US soil….
‘Natural born’ is implicit. You obviously aren’t a ‘natural born’ US Citizen if you are born to two citizens of Brunei in the UK.
Natural born means the person doesn’t have to be naturalized to become a citizen.