If a request for a preliminary determination of eligibility submitted to the department is not complete, or if additional information is required, the department will notify the public agency in what respect the request is incomplete. If the request is not completed within 60 days after notice that the request is incomplete, unless the department extends this time for good cause shown, the department will return the request to the public agency without making any finding as to eligibility and without prejudice to the submission of a new request at any future time.