Income Tax (Effective Life of Depreciating Assets) Amendment Determination 2004 (No. 4)

Administered by Department of the Treasury

Legislation au F2005B01784 Not in force Legislative Instrument

Legislation content

Income Tax (Effective Life of Depreciating Assets) Amendment Determination  2004 (No. 4)

I, BRUCE WILLIAM QUIGLEY, Deputy Chief Tax Counsel, make this Determination under subsection 40-100(1) of the Income Tax Assessment Act 1997.

Dated 8 December 2004

(Signed)

Bruce William Quigley

Deputy Chief Tax Counsel

 

1 Name of Determination

  This Determination is the Income Tax (Effective Life of Depreciating Assets) Amendment Determination  2004 (No. 4).

2 Commencement

  This Determination commences on 1 January 2005.

3 Amendment of Income Tax (Effective Life of Depreciating Assets) Determination 2001

  Schedule 1 amends the Income Tax (Effective Life of Depreciating Assets) Determination 2001.


Schedule 1 Amendments

(section 3)

 

 

ASSET

LIFE (YEARS)

REVIEWED

DATE OF APPLICATION

[1] Table A, industry category COMMUNICATION SERVICES (71110 to 71200), subcategory Telecommunication services (71200)

 

After

 Mobile switching centre hardware

10

*

1 Jul 2002

 

Insert

Satellite communication assets:

 

 

 

 Communications satellites (geosynchronous orbit)

15

*

1 Jan 2005

 High power amplifiers

12

*

1 Jan 2005

 Multiplexers

10

*

1 Jan 2005

 Satellite antennas:

 

 

 

  Electronic components, external (including low noise amplifiers)

8

*

1 Jan 2005

  Non-tracking antenna systems (incorporating data cables, dehydrators, pressurisation units, and wave guides)

8

*

1 Jan 2005

  Tracking antenna systems (incorporating antenna tracking motors, controllers, data cables, dehydrators, gearboxes, pressurisation units and wave guides)

20

*

1 Jan 2005

 Satellite earth station electronic assets (including bandwidth managers, decoders, demodulators downconverters, encoders, filters, modulators, receivers, transmitters and upconverters)

10

*

1 Jan 2005

 Satellite telemetry and control systems

15

*

1 Jan 2005

 

[2] Table A, industry category COMMUNICATION SERVICES (71110 to 71200), subcategory Telecommunication services (71200)

 

Omit

 

Equipment shelters (transportable)

25

*

1 Jul 2003

[3] Table A, industry category COMMUNICATION SERVICES (71110 to 71200), subcategory Telecommunication services (71200), under the heading Microwave radio telecommunication assets

 

Omit

 Air-conditioning units

5

*

1 Jul 2004

[4] Table A, industry category COMMUNICATION SERVICES (71110 to 71200), subcategory Telecommunication services (71200), under the heading Microwave radio telecommunication assets

 

Omit

 Batteries, rectifiers

6

*

1 Jul 2004

 Equipment shelter

25

*

1 Jul 2004

[5] Table A, industry category COMMUNICATION SERVICES (71110 to 71200), subcategory Telecommunication services (71200), under the subheading Mobile telecommunications assets, Base station assets

 

Omit

  Air conditioners

5

*

1 Jul 2002

[6] Table A, industry category COMMUNICATION SERVICES (71110 to 71200), subcategory Telecommunication services (71200)

 

Omit

Racks

20

*

1 Jul 2003

 

[7] Table A, industry category COMMUNICATION SERVICES (71110 to 71200), subcategory Telecommunication services (71200)

 

After

 Satellite telemetry and control systems

15

*

1 Jan 2005

Insert

Telecommunications assets:

 

 

 

 Air-conditioning units

5

*

1 Jul 2002

 Batteries, rectifiers

6

*

1 Jul 2002

 Racks

20

*

1 Jul 2003

 Equipment shelters (transportable)

25

*

1 Jul 2003

 [8] Table A, industry category ELECTRICITY, GAS AND WATER SUPPLY (36100 to 37020)

 

Omit

Water supply, sewerage and drainage services

(37010 to 37020)

Moulds (steel moulds for the production of castings for sewage treatment plant)

  5

 

1 Jan 2001

Sewage treatment plant

20

 

1 Jan 2001

Water mains

50

 

1 Jan 2001

 

[9] Table A, industry category ELECTRICITY, GAS AND WATER SUPPLY (36100 to 37020), after sub–category Gas supply (36200)

 

Insert

Irrigation water providers

(37010)

Channel regulators

80

*

1 Jan 2005

Cranes (including gantries)

40

*

1 Jan 2005

Dams and weirs ((incorporating gates and actuators) consisting of a barrier to obstruct the flow of water constructed from any or all of the following: concrete, earth and rockfill)

100

*

1 Jan 2005

Drain inlet

50

*

1 Jan 2005

Drainage channels (measured from the point of intersection with another drainage channel to the following intersection)

100

*

1 Jan 2005

Escapes

50

*

1 Jan 2005

Flow meters

20

*

1 Jan 2005

Irrigation channels (incorporating siphons and subways) measured from offtake or regulator to regulator:

 

 

 

 Concrete

50

*

1 Jan 2005

 Earth

80

*

1 Jan 2005

Measurement flumes

50

*

1 Jan 2005

Metered outlets:

 

 

 

 Electronic

40

*

1 Jan 2005

 Mechanical

50

*

1 Jan 2005

 Piped

40

*

1 Jan 2005

Offtakes

80

*

1 Jan 2005

Pipes: measured from valve to valve, that are of the same age and same material (not being in the nature of a repair)

80

*

1 Jan 2005

Pump inlets

50

*

1 Jan 2005

Pump sets (incorporating switchboards, starters, motors and pumps)

40

*

1 Jan 2005

Reservoirs and tanks

80

*

1 Jan 2005

Valves

40

*

1 Jan 2005

 

Water Supply

(37010)

Aerators and blowers

20

*

1 Jan 2005

Cathodic protection systems

20

*

1 Jan 2005

Chemical dosing pumps

25

*

1 Jan 2005

Pump sets (incorporating switch boards, starters, motors and pumps)

25

*

1 Jan 2005

Pressure reducing valves

25

*

1 Jan 2005

Valves (excluding pressure reducing valves)

30

*

1 Jan 2005

Raw water storage and supply assets:

 

 

 

 Bores

30

*

1 Jan 2005

 Dams and weirs

100

*

1 Jan 2005

 Dam or weir intake structures

100

*

1 Jan 2005

Water treatment assets:

 

 

 

 Balance tanks

80

*

1 Jan 2005

 Bore water treatment assets:

 

 

 

  Aerators and blowers

20

*

1 Jan 2005

  Lime silos

50

*

1 Jan 2005

  Batching tanks

80

*

1 Jan 2005

  Lime pump sets (incorporating switch boards,    starters, motors and pumps)

25

*

1 Jan 2005

  Reactors

25

*

1 Jan 2005

  Filtration tanks

80

*

1 Jan 2005

  Backwash pumps

25

*

1 Jan 2005

  Clear water tanks

80

*

1 Jan 2005

  Sludge thickeners

50

*

1 Jan 2005

  Drying beds

50

*

1 Jan 2005

 Chemical blowers

15

*

1 Jan 2005

 Chemical dosing systems

15

*

1 Jan 2005

 Chemical feeders and hoppers

25

*

1 Jan 2005

 Chemical mixers and blenders

25

*

1 Jan 2005

 Chemical storage tanks

30

*

1 Jan 2005

 Clarifiers (incorporating scrapers)

80

*

1 Jan 2005

 Clear water tanks

80

*

1 Jan 2005

 Dissolved air flotation systems

25

*

1 Jan 2005

 Filtration tanks (incorporating scrapers)

80

*

1 Jan 2005

 Flocculation tanks (incorporating scrapers)

80

*

1 Jan 2005

 Inline mixers

15

*

1 Jan 2005

 Pen-stops

25

*

1 Jan 2005

 Raw water inlet screening systems

25

*

1 Jan 2005

 Sludge treatment lagoons

50

*

1 Jan 2005

 Wash water holding tanks

80

*

1 Jan 2005

Water mains: Being lengths of trunk, distribution and reticulation mains within a section, measured from valve to valve that are of the same age and same material (not being in the nature of a repair)

80

*

1 Jan 2005

Water supply pumping station detention tanks

80

*

1 Jan 2005

Reservoirs, elevated tanks and standpipes: whether made from steel or concrete

80

*

1 Jan 2005

Service connections:

 

 

 

 Water meters

20

*

1 Jan 2005

Water supply control systems assets:

 

 

 

 Air scour flow meters, level sensors, transmitters  and meters

10

*

1 Jan 2005

 Chlorine analysers, mini labs, PH meters,  turbidity analysers and meters

7

*

1 Jan 2005

 Flow meters

20

*

1 Jan 2005

 Pressure sensors, transmitters and meters

10

*

1 Jan 2005

 Telemetry (including modems and remote transfer  units)

10

*

1 Jan 2005

 Variable speed drives

15

*

1 Jan 2005

 

 

Sewerage and Drainage Services

(37020)

Chemical dosing pumps

25

*

1 Jan 2005

Pump sets (incorporating switch boards, starters,  motors and pumps)

25

*

1 Jan 2005

Sewage service connection assets:

 

 

 

 Low pressure pumps

25

*

1 Jan 2005

 Vacuum pumps

25

*

1 Jan 2005

Sewer mains: Being lengths of collection sewers measured from manhole to manhole (including branch, main, pressure, reticulation, sub-main and trunk sewers) (not being in the nature of a repair)

80

*

1 Jan 2005

Pressure reducing valves

25

*

1 Jan 2005

Valves (excluding pressure reducing valves)

30

*

1 Jan 2005

Sewage pump station assets:

 

 

 

 Detention tanks

80

*

1 Jan 2005

 Overflow screens

25

*

1 Jan 2005

Sewage treatment assets:

 

 

 

 Air filtration systems

20

*

1 Jan 2005

 Air scrubbers

10

*

1 Jan 2005

 Chemical blowers

15

*

1 Jan 2005

 Chemical feeders and hoppers

25

*

1 Jan 2005

 Chemical mixers and blenders

25

*

1 Jan 2005

 Chemical storage tanks

30

*

1 Jan 2005

 Pen-stops

25

*

1 Jan 2005

 Water storage tanks

80

*

1 Jan 2005

 Screenings removal assets

25

*

1 Jan 2005

 Grit removal assets

25

*

1 Jan 2005

 Primary treatment assets:

 

 

 

  Primary clarifiers (incorporating scrapers)

80

*

1 Jan 2005

  Primary sedimentation lagoons

50

*

1 Jan 2005

  Primary sedimentation tanks (incorporating    scrapers and weirs)

80

*

1 Jan 2005

  Scum collection and transfer systems

25

*

1 Jan 2005

 Secondary treatment assets:

 

 

 

  Biological nutrient removal (BNR) assets:

 

 

 

   Aerators and blowers

20

*

1 Jan 2005

   BNR tanks (incorporating mixed liquor     stream, anoxic, anaerobic and swing zones                                           and diffusers)

80

*

1 Jan 2005

   Mixers

25

*

1 Jan 2005

  Secondary clarifiers (incorporating scrapers)

80

*

1 Jan 2005

  Secondary treatment lagoons

50

*

1 Jan 2005

  Secondary treatment tanks (incorporating    scrapers and weirs)

80

*

1 Jan 2005

  Sequenced batch reactors

80

*

1 Jan 2005

  Sludge aerators and blowers

80

*

1 Jan 2005

 Tertiary treatment assets:

 

 

 

  Backwash air blowers

20

*

1 Jan 2005

  Chlorine contact tanks

80

*

1 Jan 2005

  Filtration tanks

80

*

1 Jan 2005

  Reverse osmosis assets:

 

 

 

   Fine screening systems

15

*

1 Jan 2005

   Micro filtration units

15

*

1 Jan 2005

   Reverse osmosis membrane filtration units

10

*

1 Jan 2005

  UV disinfectors

25

*

1 Jan 2005

 Sludge processing assets:

 

 

 

  Anaerobic digesters

80

*

1 Jan 2005

  Anaerobic digester gas handling and blowing    systems

25

*

1 Jan 2005

  Anaerobic digester heating systems

25

*

1 Jan 2005

  Bio-filters

80

*

1 Jan 2005

  Dissolved air flotation systems

25

*

1 Jan 2005

  Lime disinfection dosing units

25

*

1 Jan 2005

  Sludge dewatering assets:

 

 

 

   Belt presses

15

*

1 Jan 2005

   Centrifuges

20

*

1 Jan 2005

   Screw conveyors

25

*

1 Jan 2005

   Screw presses

20

*

1 Jan 2005

   Sludge driers

20

*

1 Jan 2005

  Sludge heating units

20

*

1 Jan 2005

  Sludge thickening tanks (incorporating scrapers)

80

*

1 Jan 2005

Methane gas and cogeneration assets (see Table A – Electricity supply 36100 and Gas supply  36200)

 

 

 

Dams:

 

 

 

 Lined earth dams

100

*

1 Jan 2005

 Dam covers

20

*

1 Jan 2005

Effluent outfalls:

 

 

 

 Shoreline ocean

100

*

1 Jan 2005

 Extended ocean

100

*

1 Jan 2005

 River or estuary

100

*

1 Jan 2005

Sewerage control systems assets:

 

 

 

 Chlorine residual analysers and PH meters

7

*

1 Jan 2005

 Dissolved oxygen probes, level sensors,  transmitters and meters

10

*

1 Jan 2005

 Flow meters

20

*

1 Jan 2005

 Telemetry (including modems and remote transfer  units)

10

*

1 Jan 2005

 Variable speed drives

15

*

1 Jan 2005

 

 

[10] Table A, industry category MANUFACTURING (21110 to 29490)

 

Omit

Log sawmilling and timber dressing and Other wood product manufacturing

(23110 to 23290)

Clothes peg manufacturing plant (wood)

     131/3

 

1 Jan 2001

Case-making plant

     131/3

 

1 Jan 2001

Cork manufacturers’ plant

  10

 

1 Jan 2001

Frame (picture) manufacturing plant

     131/3

 

1 Jan 2001

Joinery plant

     131/3

 

1 Jan 2001

Moulding machinery (wood)

     131/3

 

1 Jan 2001

Saw milling equipment:

 

 

 

 Dry or planner mill plant:

 

 

 

  Generally (includes multi saw/trimmer, pack    docker, planner/molder, resaw or optimiser                                           docker, stress grader and tilt hoist)

10

*

1 Jan 2001

  Stacker

15

*

1 Jan 2001

  Tray sorter

15

*

1 Jan 2001

 Green mill plant:

 

 

 

  Edger line plant (includes board edger and    resaw)

10

*

1 Jan 2001

  Heating plant (includes storage bins/silos)

15

*

1 Jan 2001

  Kiln drying plant:

 

 

 

   Generally (includes kiln       trolleys/carriages, traverser and weights)

10

*

1 Jan 2001

   Timber drying kilns and reconditioners

15

*

1 Jan 2001

  Main saw line plant (includes saws, chipper    canter, board separator and cant turner)

10

*

1 Jan 2001

  Sorter and trimming line plant:

 

 

 

   Generally (includes grade mark reader     and multi trimmer)

10

*

1 Jan 2001

   Stackers

15

*

1 Jan 2001

   Vertical bin sorters

15

*

1 Jan 2001

  Log debarking plant (includes decks, carriages,   hydraulic grabs and fixed cranes, butt reducer,                                           debarker, kicker sorter and bins/pockets.)

10

*

1 Jan 2001

  Log, lumber and waste transfer equipment

15

*

1 Jan 2001

  Log yard equipment:

 

 

 

   Fixed and mobile cranes

12

*

1 Jan 2001

   Mobile equipment (including log loaders with    log grabs)

  7

*

1 Jan 2001

   Watering systems

15

*

1 Jan 2001

  Miscellaneous plant:

 

 

 

   Generally (includes air compressors,     extraction systems and pollution and air                                                         monitoring equipment)

10

*

1 Jan 2001

   Moisture meters

3

*

1 Jan 2001

   Saw and knife sharpening equipment

10

*

1 Jan 2001

   Walkways

15

*

1 Jan 2001

  Waste processing equipment:

 

 

 

   Bins - waste, chip and fuel

15

*

1 Jan 2001

   Chippers, shakers/screens and hoggers

10

*

1 Jan 2001

Wood working plant

    131/3

 

1 Jan 2001

 

 

Substitute

Log sawmilling and timber dressing

(23110 to 23130)

Saw milling equipment:

 

 

 

 Dry or planner mill plant:

 

 

 

  Generally (includes multi saw/trimmer, pack    docker, planner/molder, resaw or optimiser                                           docker, stress grader and tilt hoist)

10

*

1 Jan 2001

  Stacker

15

*

1 Jan 2001

  Tray sorter

15

*

1 Jan 2001

 Green mill plant:

 

 

 

  Edger line plant (includes board edger and    resaw)

10

*

1 Jan 2001

  Heating plant (includes storage bins/silos)

15

*

1 Jan 2001

  Kiln drying plant:

 

 

 

   Generally (includes kiln       trolleys/carriages, traverser and weights)

10

*

1 Jan 2001

   Timber drying kilns and reconditioners

15

*

1 Jan 2001

  Main saw line plant (includes saws, chipper    canter, board separator and cant turner)

10

*

1 Jan 2001

  Sorter and trimming line plant:

 

 

 

   Generally (includes grade mark reader     and multi trimmer)

10

*

1 Jan 2001

   Stackers

15

*

1 Jan 2001

   Vertical bin sorters

15

*

1 Jan 2001

  Log debarking plant (includes decks, carriages,   hydraulic grabs and fixed cranes, butt reducer,                                           debarker, kicker sorter and bins/pockets)

10

*

1 Jan 2001

  Log, lumber and waste transfer equipment

15

*

1 Jan 2001

  Log yard equipment:

 

 

 

   Fixed and mobile cranes

12

*

1 Jan 2001

   Mobile equipment (including log loaders with    log grabs)

  7

*

1 Jan 2001

   Watering systems

15

*

1 Jan 2001

  Miscellaneous plant:

 

 

 

   Generally (includes air compressors,     extraction systems and pollution and air                                                         monitoring equipment)

10

*

1 Jan 2001

   Moisture meters

3

*

1 Jan 2001

   Saw and knife sharpening equipment

10

*

1 Jan 2001

   Walkways

15

*

1 Jan 2001

  Waste processing equipment:

 

 

 

   Bins - waste, chip and fuel

15

*

1 Jan 2001

   Chippers, shakers/screens and hoggers

10

*

1 Jan 2001

 

Other wood product manufacturing

(23230 to 23290)

Clothes peg manufacturing plant (wood)

     131/3

 

1 Jan 2001

Case-making plant

     131/3

 

1 Jan 2001

Cork manufacturers’ plant

  10

 

1 Jan 2001

Frame (picture) manufacturing plant

     131/3

 

1 Jan 2001

Joinery plant

     131/3

 

1 Jan 2001

Moulding machinery (wood)

     131/3

 

1 Jan 2001

Wood working plant

    131/3

 

1 Jan 2001

 


[11] Table A, industry category MANUFACTURING (21110 to 29490), after sub–category, Log sawmilling and timber dressing (23110 to 23130)

 

  Insert

Plywood and Veneer manufacturing

(23210)

Debarking assets

15

*

1 Jan 2005

Dry clipping assets

25

*

1 Jan 2005

Heating unit assets

20

*

1 Jan 2005

Glue mixing assets

25

*

1 Jan 2005

Lay-up and glue spreading assets (including rollers, curtains, spray coaters and liquid and foam extruders)

25

*

1 Jan 2005

Log conditioning, heating and steaming assets

25

*

1 Jan 2005

Log sizing assets

20

*

1 Jan 2005

Log yard assets (see Log sawmilling and timber dressing (23110 to 23130), Saw milling equipment)

 

 

 

Materials handling assets (including belt, chain and screw conveyors)

20

*

1 Jan 2005

Packaging assets

20

*

1 Jan 2005

Presses

25

*

1 Jan 2005

Sanding and finishing assets

25

*

1 Jan 2005

Sharpening assets

30

*

1 Jan 2005

Trimming and sawing assets

25

*

1 Jan 2005

Veneer composing, jointing and splicing assets

20

*

1 Jan 2005

Veneer dryers

25

*

1 Jan 2005

Veneer patching and grading assets

20

*

1 Jan 2005

Veneer peeling and slicing assets (including rotary peelers, longitudinal, crosscut and staylog lathe slicers, log chargers and reelers)

20

*

1 Jan 2005

Veneer reconditioning assets

25

*

1 Jan 2005

Veneer sorting assets

20

*

1 Jan 2005

Wet clipping assets

25

*

1 Jan 2005

 

 

Fabricated wood manufacturing

(23220)

Board coolers

25

*

1 Jan 2005

Board curing assets

20

*

1 Jan 2005

Board storage assets

25

*

1 Jan 2005

Chipping, milling and flaking assets

15

*

1 Jan 2005

Debarking assets

15

*

1 Jan 2005

Driers

15

*

1 Jan 2005

Fibre sifters

15

*

1 Jan 2005

Flake and fibre storage assets

25

*

1 Jan 2005

Glue, resin and wax mixing and blending assets

15

*

1 Jan 2005

Heat plant and boiler assets

25

*

1 Jan 2005

Lamination assets

15

*

1 Jan 2005

Log conditioning, heating and steaming assets

25

*

1 Jan 2005

Log sizing assets

20

*

1 Jan 2005

Log yard assets (see Log sawmilling and timber dressing (23110 to 23130), Saw milling equipment)

 

 

 

Magnetic separators

25

*

1 Jan 2005

Mat forming and weighing assets (including pendistor)

20

*

1 Jan 2005

Materials handling assets (including belt, chain and screw conveyors)

20

*

1 Jan 2005

Packaging assets

20

*

1 Jan 2005

Presses (including pre-presses and hot and cold presses)

25

*

1 Jan 2005

Quality measuring assets (including blow detectors, thickness detectors and weighing bridges)

15

*

1 Jan 2005

Refiner assets

20

*

1 Jan 2005

Sanding and finishing assets

25

*

1 Jan 2005

Trimming and sawing assets

25

*

1 Jan 2005

Ventilation and dust extraction assets

15

*

1 Jan 2005

Woodchip screening and washing assets

15

*

1 Jan 2005

 

[12] Table A, industry category PERSONAL AND OTHER SERVICES (95110 to 97000), after sub–category Other personal services (95210 to 95291)

 

Insert

Waste disposal services

(96340)

Garbage compactor trucks (including the compactor)

10

*

1 Jan 2005

 

[13] Table B, items beginning with M

 

Omit

 Buses, lorries and trucks:

 

 

 

  Generally

        62/3

 

1 Jan 2001

  Heavy haulage of goods or passengers (long distance and inter-city)

   5

 

1 Jan 2001

  Heavy haulage (building and construction and road making industries)

   5

 

1 Jul 2002

 

 

[14] Table B, items beginning with M

Before

  Cars (motor vehicles designed to carry a load of  less than one tonne or fewer than 9 passengers):

 

 

 

 

Insert

 Buses having a gross vehicle mass of more than 3.5 tonnes

  15

*

1 Jan 2005

 

[15] Table B, items beginning with M

 

After

 Cars (motor vehicles designed to carry a load of less than one tonne or fewer than 9 passengers):

 

 

 

  Taxis

   4

 

1 Jan 2001

 

Insert

 Light commercial vehicles designed to carry a load of one tonne or greater and having a gross vehicle mass of 3.5 tonnes or less

12

*

1 Jan 2005

 Minibuses having a gross vehicle mass of 3.5 tonnes or less and designed to carry 9 or more passengers

12

*

1 Jan 2005

 

[16] Table B, items beginning with M

 

After

 Motor cycles and scooters

62/3

 

1 Jan 2001

 

Insert

 Trailers having a gross vehicle mass greater than  4.5  tonnes

15

*

1 Jan 2005

 Trailers having a gross vehicle mass of 4.5  tonnes or less

10

 

1 Jan 2005

 Trucks having a gross vehicle mass greater than 3.5  tonnes (excluding off highway trucks used in mining)

15

*

1 Jan 2005

  For Garbage compactor trucks see Table A,    Personal and Other Services (95110 to 97000),                             Waste disposal services (96340)

 

 

 

 

[17] Table B, items beginning with T

 

Omit

  Computerised PABX equipment

20

 

1 Jan 2001

 

Substitute

  PABX computerised assets

  10

*

1 Jan 2005

 

[18] Table B, items beginning with T

Omit

Trailers

  10

 

1 Jan 2001

 

[19] Table B, items beginning with V

After

Vending machine

   5

*

1 Jul 2001

 

Insert

Ventilation fans (excluding ducting, piping and vents)

20

 

1 Jan 2005

 

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.