The norms are in a 1978 document that shows ways to prove if an apparition is legitimate, or not. The document divides, both the positive and negative points.
Among the positive is the honesty of the person who allegedly saw the apparition. Also, living an upright life, mental sanity and the spiritual fruits of the apparition.
Under a false category, the document includes doctrinal errors in the message of the alleged apparition. Also listed are false apparitions that are used for monetary gain or those that lead the alleged visionary and his followers to commit immoral acts.