On 1 April 2017, the Intelligence and Security Act 2017 was implemented, establishing a unified legislative framework for the New Zealand Security Intelligence Service (NZSIS) and the Government Communications Security Bureau (GCSB). This Act consolidates the governance, functions, powers, and duties of these agencies under a single regime, aiming to protect New Zealand as a free, open, and democratic society. It introduces oversight and safeguards, including the establishment of the roles of the Inspector-General of Intelligence and Security and the Intelligence and Security Committee, to ensure the agencies' operations are in line with New Zealand law and human rights obligations. The Act also outlines the agencies' objectives towards national security, international relations, and economic well-being and sets specific provisions for cooperation with domestic and international partners, information handling, and the issuance of intelligence warrants.
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