The guidelines are as follows:
1. The police officer must take the prior written permission of the superior officer to go out of the state or union territory to carry out the investigation. He can take permission on the phone only in case of urgencies.
2. In cases where the police officer decides to arrest an accused in another state, he must write facts and reasons so as to satisfy why the arrest is necessary. The police officer must attempt to get an arrest or search warrant from the magistrate having jurisdiction.