Final answer:
Aircraft must be coordinated with the receiving controller, ensuring all agreed-upon conditions are met for a safe and seamless control transfer before entering another controller's jurisdiction.
Step-by-step explanation:
Before you allow an aircraft to enter another controller's area of jurisdiction, you must coordinate with the receiving controller. This process involves ensuring that the aircraft has reached certain agreed-upon conditions, such as a specific altitude, heading, or airspeed, and that the receiving controller has acknowledged and accepted the transfer of control. The act of coordination is critical for maintaining air traffic safety and ensuring seamless transition between sectors or centers.