General provisions, §§10-7-1 to 10-7-4. Relative rights of creditor and surety, §§10-7-20 to 10-7-31. Rights of surety against principal, cosureties and third persons, §§10-7-40 to 10-7-57. Tobacco contracts, §10-4-107.1. Trade name registration. Contracts of unregistered businesses valid, §10-1-491. Void and illegal contracts. Child support collection, private agencies. Waiver of rights, requirements or remedies provided by law,