Can we require employee to work a double shift if replacement doesn’t show up?

Q. We operate five personal care homes in Kentucky. State regulations say we must provide 24-hour continuous supervision for residents. Is it legal to create a policy that requires our employees to stay over on the their shift if the person replacing them on the next shift is a no-call, no-show? If we can, do we just introduce this as a new policy to our current employees? – Stacey, Kentucky