Does OSHA require we have a first aid kit?

Q: “I know that certain industries are required by OSHA to have certain First Aid supplies, and sometimes even a trained employee, on site. But when it comes to a regular office, is there any possible legal liability if there’s an accident and we don’t have anything like that on site, not even a standard First Aid kit? Does the law say we have to keep anything at all on hand?” – Gina, Montana