Fair market value determination for unquoted shares: prescribed formula apportions adjusted asset value by paid-up capital ratio. The fair market value of unquoted equity shares is prescribed by a formula that aggregates adjusted book value of specified assets, market valuation of jewellery and artistic work, fair market value of shares and securities, and stamp-duty value of immovable property, less defined liabilities; that aggregate is allocated to the equity shares using the ratio of the paid-up value of such shares to total paid-up equity share capital shown in the balance sheet.