Property, plant and equipment are stated at acquisition or construction cost, less
depreciation calculated using the straight-line method at the rates mentioned in note 13
and take into consideration the estimated useful lives of assets and property lease terms
with respect to leasehold improvements.
Finance charges on financing agreements incurred when property, plant and equipment
items are being built are capitalized until the asset begins its operations.
Other expenditures are capitalized only if the economic benefits associated with the
property, plant and equipment item increase. Another type of cost is recognized as an
expense when incurred.
Pursuant to CVM Resolution 639/10 (CPC 01 (R1) – reduction to recoverable value of assets),
an asset is tested for impairment on an annual basis. The asset’s value must be estimated
only if there is any indication of impairment.