Section 2(54) of the Companies Act, 2013, defines 'managing director'. It stipulates that a "managing director" means a director who, by virtue of the_______of a company or an._______with the company or a______passed in its general meeting, or by its Board of Directors, is entrusted with substantial powers of management of the affairs of the company and includes a director occupying the position of managing director, by whatever name called.