Inspector power to investigate related companies and connected persons, subject to prior Central Government approval and relevance. An inspector appointed under sections 210, 212 or 213 may investigate the affairs of related bodies corporate and persons - including subsidiaries, holding companies, bodies managed by the same managing director or manager, boards with the company's nominees, and current or former managing directors, managers or employees - where necessary to the investigation. Such extension requires the prior approval of the Central Government and is limited to inquiries whose results the inspector considers relevant to the original company's investigation.