S. 55 : Capital gains-Cost of improvement-Cost of acquisition-Sale of property-Non-Resident-Fair market value as on 1-4-2001-Valuation on the basis of approved Government Valuer-Assessing Officer is directed to adopt fair market value of property on the basis of as determined by Registered valuer. [S. 48, 144C(7)(a), 144C(7)(b)]