Following the expiration of the time prescribed in §209.15 for the submission of motions to intervene in a hearing, any person may file a motion with the administrative law judge to intervene in a hearing. Such a motion must contain the information and commitments required by paragraph (b) and (f) of §209.15, and, in addition, must show that there is good cause for granting the motion and must contain a statement that the movant shall be bound by agreements, arrangements, and other determinations which may have been made in the proceeding.