The business and affairs of an insurance corporation shall be managed by the incorporators until the first meeting of shareholders or members and then and thereafter by a board of directors elected by the shareholders or members and as otherwise provided by law. The board of directors shall consist of not less than five persons, and one of them shall be a resident of the State of Nebraska. At least one-fifth of the directors of an insurance company, which is not subject to section 44-2135, shall be persons who are not officers or employees of such company. A person convicted of a felony may not be a director, and all directors shall be of good moral character and known professional, administrative, or business ability, such business ability to include a practical knowledge of insurance, finance, or investment. No person shall hold the office of director unless he or she is a policyholder, if the company is a mutual company or assessment association. Unless otherwise provided in the articles of incorporation, the board of directors shall make all bylaws. A director shall discharge his or her duties as a director in accordance with section 21-2,102.