Ark. Code Ann. § 4-18-314

Any weights and measures official appointed for a county or city shall have the duties and powers enumerated in this subchapter, excepting those duties reserved to the state by law or regulation. These powers and duties shall extend to their respective jurisdictions, except that the jurisdiction of a county official shall not extend to any city for which a weights and measures official has been appointed. No requirement set forth by local agencies may be less stringent than or conflict with the requirements of the state.