Fair market value deemed as full consideration where sale consideration is not ascertainable, affecting capital gains computation. Section 50D provides that where consideration from the transfer of a capital asset is not ascertainable or cannot be determined, the fair market value of the asset on the date of transfer shall be deemed to be the full value of consideration for computing income chargeable to tax as capital gains; the provision takes effect from the 1st day of April, 2013 and applies to the relevant assessment year and subsequent assessment years.