<human>:  When did the flag change in Papua New Guinea?
<bot>: The flag of Papua New Guinea was adopted in 1975, and the current flag was adopted in 2001. The current flag is blue with the national coat of arms centered on the flag. The Papua New Guinea coat of arms is a shield divided into three sections. The top section has a white shield with a blue background and a golden border. The middle section is a red shield with a white background and a blue border. The bottom section is a yellow shield with a blue background and a white border.