So, you would have no problem with the States of the Mountain West prohibiting you by law from buying any booze or tobacco at any time. It's a regional tradition not to partake of these.
The South has a lot of cultural customs. Let's make biscuits and gravy mandatory Sunday breakfast. Let's outlaw unsugared tea. Let's arrest anyone not in church on Sunday morning for vagrancy. Cultural customs are great, but they shouldn't be the basis of the law, because not following local tradition shouldn't be illegal. If the traditions are true and strong, they'll take care of themselves without John Law's help.
Red herring alert. Do biscuits and gravy have any history in the legal tradition of the Southern community? No, they do not.