Adoption of revaluation model

Hello tutor,

I do not understand why the adaption of the revaluation model for NC assets previously held at cost is not considered a change of accounting policy? Can you please help explain?

Thank you!

“Which of the following would be treated as a change of accounting policy under IAS 8
Accounting Policies, Changes in Accounting Estimates and Errors?
O A change in valuation of inventory from a weighted average to a first-in-first-out (FIFO)
basis
O A change of depreciation method from straight line to reducing balance
O Adoption of the revaluation model for non-current assets previously held at cost
O Capitalisation of borrowing costs which have arisen for the first time”