(a) Any county officer or employee who has a substantial financial interest, direct or indirect or by reason of ownership of stock in any corporation, in any contract with the County or in the sale of any land, material, supplies or services to the County or to a contractor supplying the County, shall make known that interest and shall refrain from voting upon or otherwise participating in the making of such a contract or sale.
(b) Any county officer or employee who wilfully conceals such a substantial financial interest, or wilfully violates the requirements of this section, shall be guilty of malfeasance in office or position and shall forfeit his or her office or position.
(c) Violation of this section with the knowledge express or implied of the person or corporation contracting with or making a sale to the County shall render the contract voidable by the County Executive or the County Council.