If this is not the ceiling of a garage with living space above or some kind of multifamily building, you do not need fire separation.

Good to hear. Would there be any restrictions on what type of
sheeting we put between the T&G and the joists if we wanted to create
a good barrier for air and dust? Was thinking of heavy poly sheeting
or maybe even roofing paper but not sure if that's wise on the
interior.

THANKS!!!