Based on the provided text, what is the protocol for departing from Shirdi, and what are the consequences of not following it?

The text from Chapter 35 describes a strict protocol for leaving Shirdi. It is explicitly stated that Baba's permission is required to depart. Leaving by one's own will, without this consent, is considered a transgression that invites dreadful interruptions and obstacles on the way, leading to remorse and humiliation. The text emphasizes Sai's control over the arrival and departure of devotees, quoting Baba as saying, "No one comes unless I bring them." The proper way to leave is to go to Baba and ask for permission. The sign of this permission being granted is when Baba gives his blessing along with the Udi Prasad. This act serves as the official sanction to depart.