In areas that lack a nationally recognized fire code as listed in Local Government Code, §233.062(c) and lack water lines sized for fire protection, setbacks from roads and right-of-ways shall be a minimum of 10 feet, setbacks from adjacent property lines shall be a minimum of five feet, and shall not conflict with separation or setback distances required by rules governing public utilities, on-site sewerage facilities, or drinking water supplies. Setback lines required elsewhere in the orders or rules of the county shall control to the extent greater setbacks are therein required.