(I) Share-based payment transactions
i) Equity-settled share-based payments to employees and directors
The grant date fair value of equity-settled share-based payment awards granted to employees and directors is recognised as an expense, with a corresponding increase in equity, over the vesting period of the award. The amount recognised as an expense is adjusted to reflect the number of awards for which the related service and non-market vesting conditions are expected to be met, such that the amount ultimately recognised as an expense is based on the number of awards that meet the related service and non-market vesting conditions at the vesting date.
Where the terms and conditions of equity-settled share-based payments are modified, the increase in the fair value, measured immediately before and after the modification date, is charged to profit or loss over the remaining vesting period or immediately for vested awards. Similarly where equity instruments are granted to non-employees, they are recorded at the fair value of the goods or services received in profit or loss. Additional information about significant estimates and the assumptions used in the quantifying of the equity-settled share-based payment transactions and modification are disclosed in note
23.1.
ii) Cash-settled share-based payments to employees and directors
The grant date fair value of cash-settled awards granted to employees and directors is recognised as an expense, with a corresponding increase in the liability, over the vesting period of the awards. At each reporting date the fair value of the awards are re-measured with a corresponding adjustment to profit or loss. The method of calculating the fair value of the cash-settled share-based payments changed during quarter
1
of
2017
from the intrinsic valuation method to the Black-Scholes method. The Black-Scholes method includes the effect of share volatility in calculating the fair value of the share-based payment awards. The change was applied prospectively and did
not
have a significant effect on the liability value. Additional information about significant judgements, estimates and the assumptions used to estimate the fair value of cash-settled share-based payment transactions are disclosed in note
23.2.
