This question is best answered by local law officials, as the laws vary by town and city, and there are too many towns in Arkansas to even begin to find all of the laws on curfews.
My best advice is if you find a police officer who is on the street and not doing anything, ask him, he will probably answer correctly.
Other than that, you could go to your local police station and ask them, just be nice about it.
You could go to your local library, they might have copies of all the local laws as reference materials, but good luck finding that particular law.
Most high schools will commonly have a police officer at the school, but its not certain.
But none of these are legally binding (if they say it is one way, then you get in trouble, you can't say "but he said it was ok!")