Commercial codes are more stringent, and it's easy to see why with ventilation standards. Commercial settings will see many more people in a given area, and the rate may be increased to reduce the incidence of airborne infections spreading.
I believe most of the US residential code now falls under IRC (International Residential Code) and the most recent version requires 0.35ACH or 15CFM per occupant. It also requires 100CFM intermittent or 25CFM continuous from kitchens and 50CFM intermittent/20CFM continuous from bathrooms.
ASHRAE 62.2 is residential ventilation industry standard, and I believe the latest version stipulates 7.5CFM/occupant + 1CFM/100sqft (
Environmental Energy Technologies Division News)