(vi) the single largest shareholder is either a design professional or an ESOP with greater than seventy-five percent of the plan's voting trustees being design professionals and greater than seventy-five percent of the plan's committee members being design professionals.
No shareholder of a design professional service corporation shall enter into a voting trust agreement, proxy or any other type of agreement vesting in another person, other than another shareholder of the same corporation, the authority to exercise voting power of any or all of his or her shares. All shares issued, agreements made or proxies granted in violation of this section shall be void.