Unvaccinated Universal team members are required to wear a face mask "at all times while on property."
Holiday parades and fireworks return to the Disneyland Resort on Nov. 12.
Universal has not been forthcoming with other COVID-19 safety details for HHN, even amid a surge in hospitalizations in Central Florida.
Disney World is still requiring masks in all indoor attractions, queues and shops.
Team members at Universal will be required to wear masks in indoor areas starting Saturday, but the requirement doesn't apply to guests.
Both vaccinated and unvaccinated guests will have to wear masks in indoor spaces and throughout all attractions.
A new St. Louis County mask mandate covers all guests in public, indoor spaces, regardless of vaccination status.