The first use time for the amount is:
(a) if the amount is included in the first element of the asset's * cost--the time at which you start to use the asset, or have it * installed ready for use; or
(b) if the amount is included in the second element of the asset's cost--the later of:
(i) the time at which it becomes included in that element under paragraph 40 - 190(2)(a); or
(ii) the time mentioned in paragraph (a).