Fair market value rules govern valuation of jewellery, shares, immovable property, and other assets under specified tax provisions. Rule 57 prescribes the manner of determining fair market value for specified property under the listed provisions. Jewellery, artistic works, quoted shares and securities, unquoted equity shares, other unquoted shares and securities, immovable property, and any other property are each valued by separate rules, including open market price, invoice value, stock exchange transaction value, stamp duty value, or a prescribed formula for unquoted equity shares. The rule also permits valuation reports from a registered valuer, merchant banker, or accountant in specified cases.