Exemption for pass-book imports allows duty-free importation subject to bond, port restrictions and fulfillment of export obligations. Exemption permits duty-free importation against a Self Declared Pass Book issued under para 54 of the Export and Import Policy 1992-1997, conditional on production of the prescribed Pass Book, execution of a bond or undertaking and a declaration to pay duties where conditions are unmet. Clearance requires a debit entry by customs; imports/exports are limited to listed ports unless specially permitted. Export obligations must be discharged within two years or extended by the Director General of Foreign Trade, with restrictions on input-stage excise credit, prior facility claims and drawback where Pass Books lack quantity restrictions.