Inquiry procedure under section 26 requires Commission review of the investigative report, circulation for objections, and show cause before final orders. The regulation requires the Secretary to place the investigative agency's report before the Commission promptly, after which the Commission may circulate a non-confidential version for objections, order further investigation, or commence its own inquiry; it may require financial disclosures when circulating reports, must issue a show-cause notice before finalizing matters after further inquiry, consider replies with a hearing opportunity, and may compel production of specified books or documents on authorised justification.