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Acts Interpretation Act 1931
9Commencement
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### 9 Commencement
> *\[Section 9 Amended by No. 40 of 1985, s. 4 \]**\[Section 9 Amended by No. 4 of 1990, s. 10 and Sched. 1 \]**\[Section 9 Amended by No. 40 of 1985, s. 4 \]**\[Section 9 Amended by No. 4 of 1990, s. 10 and Sched. 1 \]*
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> > (1) *\[Section 9 Subsection (1) omitted by No. 4 of 1990, s. 10 and Sched. 1 \]*. . . . . . . .
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> > (2) *\[Section 9 Subsection (2) substituted by No. 39 of 1981, s. 8 \]*Every Act to which the Royal Assent has been given by the Governor for or on behalf of the Sovereign before the commencement of [section 8 of the](/view/html/inforce/2026-04-12/act-1981-039#GS8@EN) [Acts Interpretation Amendment Act 1981](/view/html/inforce/2026-04-12/act-1981-039) shall, unless the contrary intention appears in the first-mentioned Act, be deemed to have come into operation on the day on which that Act received the Royal Assent.
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> > (3) *\[Section 9 Subsection (3) substituted by No. 39 of 1981, s. 8 \]*Every Act to which the Royal Assent is given by the Governor for and on behalf of the Sovereign on or after the date of commencement of [section 8 of the](/view/html/inforce/2026-04-12/act-1981-039#GS8@EN) [Acts Interpretation Amendment Act 1981](/view/html/inforce/2026-04-12/act-1981-039) shall, unless the contrary intention appears in the first-mentioned Act, come into operation on the fourteenth day after the day on which that Act receives the Royal Assent.
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> > (3A) [*\[Section 9 Subsection (3A) inserted by No. 62 of 2000, Sched. 1, Applied:14 Nov 2000\]*](/view/html/inforce/2000-11-14/act-2000-062#JS1@Ja1@GC1@EN) Despite [subsection (3)](#GS9@Gs3@EN) , if a provision of an Act provides that the Act or a portion of the Act commences on a day, or a day or days, to be proclaimed, that provision and the provision providing for the short title of the Act come into operation on the day on which the Act receives the Royal Assent unless the Act expressly provides otherwise.
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> > (4) *\[Section 9 Subsection (4) inserted by No. 39 of 1981, s. 8 \]*Every Act reserved for the signification of the Sovereign's pleasure after the commencement of [section 8 of the](/view/html/inforce/2026-04-12/act-1981-039#GS8@EN) [Acts Interpretation Amendment Act 1981](/view/html/inforce/2026-04-12/act-1981-039) shall, unless the contrary intention appears in that Act, come into operation on the day after the day on which a proclamation of the Governor signifying the Sovereign's assent is published or notified in the *Gazette*.
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> > (5) *\[Section 9 Subsection (5) inserted by No. 39 of 1981, s. 8 \]*Where an Act, or a regulation or other instrument or document made, issued, or granted under an Act, is expressed to commence, come into operation, or take effect on a particular day, it shall commence, come into operation, or take effect immediately on the expiration of the last preceding day.