The Hong Kong Identity Card (or HKID) is an official identity document issued by the Immigration Department of Hong Kong to all people who hold the right of abode, right to land or other forms of limited stay longer than 180 days in Hong Kong. According to Basic Law of Hong Kong, all permanent residents are eligible to obtain the Hong Kong Permanent Identity Card which states that the holder has the right of abode in Hong Kong. All persons aged 16 and above must carry a valid legal government identification document in public. All persons aged 16 and above must be able to produce valid legal government identification documents when requested by legal authorities; otherwise, they may be held in detention to investigate his or her identity and legal right to be in Hong Kong.