The requirement of AASB 138 in relation to the amortisation of development cost is that:

1. it is to be amortised straight-line over a period not greater than 20 years

2. it is to be amortised using an accelerated depreciation rate over a period not exceeding 10 years

3. it is to be amortised from the time the asset is available for use and shall reflect the consumption of the economic benefits by the entity.

4. it is to be amortised from the time of deferral so as to match the cost to the related benefits