(1) No member of a drainage board shall be interested directly or indirectly:
(a) In any contract with the drainage board; or (b) In any contract for work or materials in or for a drainage district; or (c) In any contract for the sale of machinery or materials for or to the drainage board; or (d) In the wages or supplies of persons employed on work in or for a drainage district.
(2) No board member shall deal in securities of a drainage district.