CrassZoro asking us for legal advice might not be best. What if someone on here who lives say in Alaska quotes the laws there? If you get pulled over in Alabama will you say you thought what you did was legal because someone posted something online? In Ontario, Canada I'd say no one would care, provided you had two means of attachment and lights/reflectors on the rear but I don't line in Alabama.
Why not call the local Highway Patrol? Usually they have cops who can quote laws directly, no matter how obscure. You haven't broke a law, so it's just a question and if they don't know locally they can probably point you to a contact person or agency that can better help you than us.