According to the Immigration Ordinance, Chapter 115, Laws of Hong Kong:
to enter into a recognizance in the prescribed form in such amount, with such number of sureties and subject to such conditions as the immigration officer or police officer may reasonably require or impose; and where a person who is so detained enters into such a recognizance he may be released.
The address of the Recognizance (Reporting) Offices of the Immigration Department is as follows: