Section 88.20 - Conflict of interest prohibited(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.