 Though immigration officers also have powers of arrest outside immigration and nationality offences under the Criminal Justice and Public Order Act 1994, the Crime and Courts Act 2013, and under the Terrorism Act 2000 discussed below.Before the UKBA was established, British immigration officers were not uniformed, but they now wear a uniform with rank insignia.An immigration officer at a port has the power to detain any person without arrest who is not a British citizen to investigate whether they qualify for entry to the United Kingdom under Schedule 2 of the Immigration Act 1971.