A person is unsound mind and stands so declared by a competent court; if he is an undischarged insolvent; if he is not a citizen of India, or has voluntarily acquired the citizenship of a foreign State, or is under any acknowledgment of allegiance or adherence to a foreign State; if he is a licensed architect, draughts man, engineer, plumber, surveyor or town planner or employee of a firm of which any such licensed person is also a partner; if he is interested, directly or indirectly in any business of development of land in Delhi; if he is interested in any subsisting contract made with, or any work being done for, the Authority except as a shareholder (other than a director) in an incorporated company or as a member of co operative society; if he is retained or employed in any professional capacity either personally or in the name of a firm of which he is a partner or with which he is engaged in a professional capacity, in connection with any cause or proceeding in which the Authority is interested or concerned; if he, having held any office under the Government, has been dismissed for corruption or disloyalty to the State within a period of four years; and if he fails to pay any arrears of any kind due by him, otherwise than as an agent, receiver, trustee an executor, to the Authority within three months after a notice in that behalf has been served upon him.