During a shift handover or positional relief at the Bahrain Area Control Centre (BACC) or Bahrain Tower, why is the use of a standardized verbal and written relief checklist strictly mandated?

1. To satisfy local airport retail advertising regulations
2. To ensure a seamless, structured transfer of the mental model, covering active traffic, non-standard clearances, airspace constraints, weather hazards, and unserviceable equipment without omitting critical information
3. To allow the incoming controller to leave early before the outgoing controller signs off
4. To reset the radar antenna rotation speed to zero