This Act is explicitly designed to interact with multiple existing laws by applying substitution rules, continuing instruments and mapping references. The principal interaction mechanisms are set out in ss 17-19 and s 25 and are summarised below with direct section citations.
Application of Interpretation Act rules: Section 17 applies provisions of the Interpretation Act 1984 about the repeal of written laws and substitution of other written laws to the repeal of Acts mentioned in Schedule 1, treating the repealed Acts as if repealed and re‑enacted by the PD Act (s 17(1)). Section 17(2) makes clear other provisions of this Act are additional to those applied by s 17(1) and do not affect their operation except as specified. This creates a legal bridge for statutory cross‑references, definitions and substitution by reference across the corpus of Western Australian written law.
Reference conversion: Section 19 operates as a statutory conversion rule, instructing that references in written laws to enactments repealed may be read as references to corresponding PD Act provisions, and that references to town planning schemes, regional planning schemes and statements of planning policy may be read as local planning schemes, region planning schemes and State planning policies under the PD Act where context requires (ss 19(1)-(4)). This reduces the need for immediate textual amendment across statutes and subordinate instruments.
Continuation and reclassification of subsidiary legislation: Section 25 maps specific regulation‑making powers and instruments under the old Acts to specified sections of the PD Act and continues them in force. For example, regulations made under section 8 of the TPD Act or section 26 of the MRTPS Act continue as if made under s 256 of the PD Act, and local laws under s 31 of the TPD Act continue as if under s 262 of the PD Act (s 25(1)(a), (2)). Fees under s 29 of the TPD Act continue until fees are set under s 20 of the PD Act (s 25(3)). This mapping keeps subordinate law operational while the PD Act’s own provisions and subordinate instruments come into effect.
Transitional privilege for existing processes: Planning schemes in the course of preparation under the TPD or WAPC Acts may continue to be prepared as if steps taken were under the PD Act (s 26). That reduces friction where statutory processes had multiple procedural stages under the old Acts.
Caveat and notification integration: Caveats lodged or registered under specified sections of the MRTPS Act or WAPC Act are brought within the PD Act notification framework (s 27(1)-(2)). Instruments and rights relying on caveats therefore migrate to the PD Act’s statutory mechanism for notifications (sections 180 and 181 of the PD Act are specifically referenced in s 27).
Savings for specific repealed subsections: Sections 28-30 preserve the application and validity of specified repealed subsections in relation to particular town planning schemes, amendments, agreements, acts and things, ensuring that repeal does not retroactively invalidate extant legal arrangements. Those savings operate as cross‑statutory exceptions to the general repeal effect.
Delegated amendment of subsidiary legislation: Section 16 gives the Governor, on the Minister’s recommendation, power to amend subsidiary legislation made under any Act, but only where the Minister considers each amendment necessary or desirable as a consequence of the PD Act or this Act (s 16(1)-(2)). This provides a statutory tool for adjusting other Acts’ subordinate instruments to align with the PD Act.
Validation provision: Section 31 validates certain approvals under the Town Planning and Development Act 1928 by construing them as if PD Act s 145 had applied, thereby aligning historical administrative acts with the PD Act’s equivalent approval mechanism.
Overall, the Act operates as an integrating statute. It does not replace or rewrite other Acts substantively; rather it provides statutory rules to interpret, continue, map and validate interactions so that the PD Act can be introduced without undue discontinuity. Legal obligations, offences, adjudicative and enforcement mechanisms that originate in the PD Act or in continued subordinate instruments remain governed by those Acts and instruments, subject to the specific transitional exceptions and protections in this Act.