You should obtain an application form (ACMA form B15) from the ACMA.
Your completed form may be lodged in person or by post or courier. You will be sent a confirmation of receipt of your application.
Your completed form must include a statement of your own opinion as to whether the person or company about whom the opinion is sought is, or would be, in a position to exercise control of the licence, newspaper or company in question. The ACMA may charge a fee for providing an opinion.