Such application shall be filed in triplicate with the Planning Director, who shall transmit a copy thereof, together with all the plans, specifications and other papers pertaining to the application, to the Chairman of the Board. Each such application shall be accompanied by a filing fee as set by the City Council. All applications for a variance or special exception shall include a disclosure statement, signed by the applicant and witnessed as such, of the equitable ownership of the real estate affected, which shall list the names and addresses of all the real parties in interest, including all applicants, title owners, contract purchasers and lessees of the land described in the application, all partners, both general and limited, in any partnership and, if any of the foregoing is a trustee, each beneficiary having an interest in such land and, in the case of corporate ownership, the names of stockholders, officers and directors; provided, however, that the corporate requirement shall not apply to a corporation whose stock is traded on a national or local stock exchange and having more than 500 shareholders. The applicant shall keep this information current at all times during the processing of the application.