The Government Communications Security Bureau Act 2003 defines the functions of the GCSB and makes provision for its administration and the conduct of its operational activities. Oversight of the GCSB's activities is established in the Intelligence and Security Committee Act 1996 and the Inspector-General of Intelligence and Security Act 1996.
On 15 April 2013, Prime Minister and Minister responsible for the GCSB John Key announced proposed legislative changes to the GCSB Act 2003 and to the oversight regime of New Zealand’s intelligence community. Further details can be found at: http://www.beehive.govt.nz/release/pm-announces-next-steps-response-gcsb-report.
The GCSB is subject to all New Zealand law, although specific exemption provisions are contained in some legislation, such as the Privacy Act 1993, the Public Finance Act 1989, and the Radio Communications Act 1989. Other more general exemptions are contained in the Human Rights Act 1993 and the Public Records Act 2005.