Does New York City law require that an adult carry some kind of identification on them at all times?

Answer 1

All non Citizens in theory should carry some kind of identification, visa, greeen card etc

However, I read your questions and kind of suspicious of your motives!!

Answer 2

Identification is always important in every place you go. Thus, one should always carry any ID or passport to identify one's self in case of accident, emergency or random inspection by the authorities.

Answer 3

yea DNA