67.1727.  Board members not to hold county office, exception — United States citizenship and residence in county of district required — financial interest in district contracts prohibited. — No board member shall hold a public office of any county within the metropolitan district, other than the office of notary public.  Board members shall be citizens of the United States and they shall reside within the county from which they are appointed.  No board member shall receive compensation for performance of duties as a board member.  No board member shall be financially interested directly or indirectly in any contract entered into pursuant to sections 67.1700 to 67.1769.