I used to teach preschool.
There IS a clause about naptime. But that is for OLDER kids and there still have to be enough teachers available at the facility to cover the class in case the kids wake up or (heaven forbid) a fire alarm (we had a faulty alarm go off in the middle of naptime once; we were very glad to have the extra people to come help us evacuate until we had the all clear to re-enter with the now wide-awake toddlers).
I am not sure how old they have to be before the clause kicks in, but if your child is under 12 months, I KNOW it does not apply. Babies are STRICTLY 4 to 1.
Day care centers do NOT make money on babies (they only care for them to try to keep them until they are old enough to be put in a larger group where they WILL make money on them). If you are going to get the state involved, you may want to persue other child care arrangements. The center could be cited/fined or worse: closed down.
You are right in asking. They have obviously twisted the laws. The book is called the "Minimum Standards for Child Care" and that is just what it is: MINIMUM. If a center is doing BETTER than the minimum, they are the CADILAC of child care and VERY rare.
I'll be praying for your situation. It is centers like this that made me step down from the workforce.