Stamp duty value deemed full consideration unless specified payment conditions or a valuation reference alters treatment. Where consideration for transfer of land or building is less than the stamp duty valuation, the stamp duty value is deemed the full value of consideration; the agreement-date stamp duty value may be used if the agreement and registration dates differ and payment was made before the agreement by prescribed account-payee or electronic modes; also a consideration within a prescribed percentage of stamp duty value may be treated as full value. The Assessing Officer may refer disputes on fair market value to a Valuation Officer, and if that value exceeds stamp duty value, the stamp duty value prevails as full consideration.