The ordinance was brought into force on 20th december 1996 . implications for data users and data subjects data users must follow the fair information practices stipulated in the data protection principles in schedule 1 of the ordinance 资料使用者必须按照本条例附表1载列的保障资料原则,以当中所订明的公平资讯措施来处理和使用个人资料。