(1) All
depreciable assets recorded in the assets register
must be depreciated using the “straight line method” over their estimated
useful lives. The estimated useful
lives must be -
(a)
appropriate for
the type, use and location of the assets;
(b)
specified in
the Finance Manual for the agency;
and
(c)
within the
following ranges –
Asset Class Estimated
Useful Life
(i)
Buildings 40-60
years
(ii)
Infrastructure
assets 20-100
years
(iii)
Vehicles 5-15 years
(iv)
Computer
software 3-15 years
(v)
Computer
hardware 4-10 years
(vi)
Other plant
and equipment 5-20 years
(vii) Other intangible assets 3-20 years
(Finance Instructions 2005 s(58))