Valuation of second hand machinery requires independent engineer certificate; customs may reject declared value under Rule 12. Importers must submit a certificate from an independent chartered engineer (or approved inspection agency where load port certificates are absent) stating new price in year of manufacture, current CIF value if new, year of manufacture, supplier's sale price, present condition, details and cost of reconditioning/repairs (including dismantling) and expected residual life; assessing officers will examine these documents and NIDB data to accept the declared amount as the transaction value or reject and re determine value under Rule 12 of the Customs Valuation Rules 2007.