IFRS permits companies to carry assets at historical cost or use a revaluation model for fixed assets. According to IAS 16, if revaluation is used:
1. it must be applied to all assets in a class of assets.
2. assets must be revalued on an annual basis.
3. assets must be depreciated on the straight-line basis.
4. salvage values must be zero.
Which of these answers is correct, it can be multiple choices