Section 115 of the Sentence Administration Act 2003 (WA) excludes the rules of natural justice only in relation to the Board's functions under pts 2-6, not in relation to reviews under s 115A in pt 10. The Board has power to conduct oral hearings under ss 106-107 of the Act, and a blanket policy against oral hearings in the context of s 115A reviews is unlawful. However, breach of the Board's statutory obligations under s 107B (notice, reasons, and advice of review rights) does not necessarily invalidate the underlying decision — the question of validity depends on the Project Blue Sky analysis of whether the legislature intended non-compliance to produce invalidity. Section 115A operates as a privative clause but does not protect against jurisdictional error, and so construed is constitutionally valid following Kirk.
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