16 If,- (a) the horological raw materials are imported for the manufacture of components of wrist watches (watches designed primarily to show the time of the day, with or without additional features), mechanical or quartz analog; (b) the importer executes a bond in such form and for such sum as may be specified by the Assistant Commissioner of Customs, binding himself to pay on demand, in respect of such quantity of the said materials as is not proved, to the satisfaction of that Assistant Commissioner, to have been used for the above purpose, an amount equal to the difference between the duty leviable on the said materials but for the exemption under this notification and that already paid at the time of importation; and (c) the importer, within such period as the said Assistant Commissioner may specify in this behalf, produce a certificate from the Assistant Commissioner of Central Excise in whose jurisdiction the factory manufacturing components of the said wrist watches is situated, to the effect that the imported horological raw materials have been used in the manufacture of the said components. 17 If,- (a) the goods at (i) to (vi) in List 4 to the notification are imported for use in the flyash based building materials industry, the goods at (vii) to (xii) are imported for use in the phosphogypsum based building materials industry, the goods at (xiii) to (xviii) are imported for making clay-flyash bricks and the goods at (xix) to (xxvii) of that List are imported for production of pre-fabricated components; (b) an officer not below the rank of a Deputy Secretary to the Government of India in the Ministry of Urban Development certifies in each case that the said goods are for use in the industry specified above and recommends grant of the exemption; and (c) the importer furnishes an undertaking to the effect that he shall use the goods for the purpose specified and in the event of his failure to do so, he shall be liable to pay an amount equal to the difference between the duty leviable on the said imported goods but for the exemption under this notification and that already paid at the time of importation. 18 If the importer at the time of importation furnishes an undertaking to the Assistant Commissioner of Customs to the effect that,- (a) in the case of wind operated electricity generators and wind operated battery chargers the goods shall not be sold or otherwise disposed of in any manner for a period of at least two years from the date of importation; (b) in the case of parts of wind operated electricity generators, they shall be used for the manufacture of wind operated electricity generators; and (c) in case he fails to comply with condition (a) or condition (b) or both conditions, as the case may be, he shall pay an amount equal to the difference between the duty leviable on the imported goods but for the exemption under this notification and that already paid at the time of imporation. 19 (a) If an officer not below the rank of a Deputy Secretary to the Government of India in the Department of Fertilizers- (i) certifies that the scheme for renovation or modernisation, as the case may be, of the fertilizer plant has been granted techno-economic clearance by the said Department; (ii) recommends, in each case, the grant of exemption under this notification to,- (A) Machinery, instruments, apparatus and appliances, as well as components (whether finished or not) or raw materials for the manufacture of aforesaid items and their components, required for renovation or modernisation of a fertiliser plant; and (B) spare parts, other raw materials (including semi finished material) or consumables stores, essential for maintenance of the fertiliser plant mentioned above, (hereinafter referred to as the said goods), for such scheme; and (iii)certifies in each case, that the said goods are, or will be, required for the purposes specified above; (b) the value of import of the goods specified at (B) above shall not exceed 10% of the value of imported goods specified at (A) above; (c) if the importer furnishes an undertaking to the Assistant Commissioner of Customs to the effect that the said imported goods shall be used for the purposes specified above and in the event of his failure to use the goods for such purposes, he shall pay an amount equal to the difference between the duty leviable on the said imported goods but for the exemption under this notification and that already paid at the time of importation. 20 If,- (A) the spinnerettes acquired in exchange, are imported, within one year of the date of exportation of spinnerettes out of India; and (B) no drawback of duty has been paid on the occasion of their export. Explanation.- On the imports referred to in condition (A) above, the duty would be leviable as if the value of the said spinnerettes were equal to- (i) the cost of such exchange, that is to say, the aggregate of - (a) labour charges; (b) cost of that quantity of gold, platinum and rhodium, if any, which is in excess of the respective quantity of gold, platinum or rhodium contained in the said spinnerettes exported out of India; and (c) any other charges paid by the importer to the supplier of such spinnerettes for such exchange of spinnerettes; and (ii) the insurance and freight charges, both ways. 21 The importer at the time of clearance produces a certificate from the Director General of Civil Aviation that the navigational, communication, air-traffic control and landing equipment and spares for maintenance of such equipment are required to be used for the modernisation of airport facilities and recommends the grant of exemption to the said goods. 22 If,- (i) in the case of a power plant (except a nuclear power plant), an officer not below the rank of Director in the Central Electricity Authority certifies that the scheme for renovation or modernisation, as the case may be, of such power plant, has been granted techno- economic clearance by the said Authority and an officer not below the rank of a Deputy Secretary to the Government of India in the Department of Power recommends, in each case, the grant of the aforesaid exemption to the goods for such scheme; (ii) in the case of nuclear power plant, an officer not below the rank of a Deputy Secretary to the Government of India in the Department of Atomic Energy certifies that the said power plant has been granted techno- economic clearance and recommends the grant of the aforesaid exemption to the goods for such scheme; and (iii) in all cases, the importer furnishes an undertaking to the Assistant Commissioner of Customs to the effect that the said goods shall be used for the purpose specified above and in the event of his failure to use the goods for the renovation or modernisation of the said power generation plant, he shall pay an amount equal to the difference between the duty leviable on the said imported goods but for the exemption under this notification and that already paid at the time of importation. 23 If,- (a) in the case of a power plant (except a nuclear power plant), an officer not below the rank of Director in the Central Electricity Authority certifies the quantity, description and technical specifications of raw materials and components required to be imported for the manufacture and supply of machinery and equipment to the said power generation plant and an officer not below the rank of a Deputy Secretary to the Government of India in the Department of Power recommends, in each case, the grant of this exemption to the imported goods for such purposes; (b) in the case of nuclear power plant, an officer not below the rank of a Deputy Secretary to the Government of India in the Department of Atomic Energy certifies the quantity, description and technical specifications of raw materials and components required to be imported for the manufacture and supply of machinery and equipment to the said power generation plant and recommends the grant of this exemption to the imported goods; and (c) in all cases, the importer furnishes an undertaking to the Assistant Commissioner of Customs to the effect that the imported goods shall be used for the purpose specified above and in the event of his failure to use the goods for the purpose specified, he shall pay an amount equal to the difference between the duty leviable on the said imported goods but for the exemption under this notification and that already paid at the time of importation. 24 If the importer produces a certificate from an officer not lower in rank than a Joint Director in the Department of Electronics, Government of India mentioning the technical specifications, description and quantity of the moulds, tools and dies and certifying that they are required for the manufacture of electronic components and recommending grant of exemption. 25 If, in the case of imports of parts and spare parts, the importer furnishes an undertaking to the Assistant Commissioner of Customs, to the effect that- (a) the parts, or as the case may be, the spare parts shall be used for the manufacture or maintenance, as the case may be, of the medical equipment specified in List 8 to the notification; (b) he shall, within three months or such extended period that the said Assistant Commissioner may allow, produce- (i) in the case of parts, a certificate from the Assistant Commissioner of Central Excise having jurisdiction over the factory manufacturing the said medical equipment, to the effect that the parts have been used in the manufacture of the said medical equipment; or (ii) in the case of spare parts, necessary evidence to the satisfaction of the Assistant Commissioner of Customs to the effect that the spare parts have been used for the maintenance of the specified medical equipment; and (c) he shall pay on demand, in the event of his failure to comply with the above conditions, an amount equal to the difference between the duty leviable on such quantity of the parts or, as the case may be, spare parts, but for the exemption under this notification and that already paid at the time of importation. 26 If the research institution furnishes a certficate to the Assistant Commissioner of Customs from an officer not below the rank of a Joint Director in the Department of Electronics of the Government of India to the effect that imported computer peripheral devices and power supply units are required for the manufacture of computer systems to be supplied to the said institution and that it shall use the computer exclusively for research purposes and that it is not engaged in any commercial activity. 27 If an accredited representative of the unit or team executes a bond in such form and with such surety as may be acceptable to the Assistant Commissioner of Customs, binding himself to pay on demand an amount equal to the duty leviable on such equipment and cameras if the same are not placed under customs control for re- export within a period of three months or such extended period as the said Assistant Commissioner may permit, after clearance for home consumption. 28 If the importer furnishes at the time of importation, to the Assistant Commissioner of Customs, an undertaking to the effect that,- (a) the imported goods shall be used for the purposes specified; (b) he shall, within three months or such extended period as the said Assistant Commissioner may specify in this behalf, produce a certificate from the Assistant Commissioner of Central Excise in whose jurisdiction the factory manufacturing undiffused silicon wafers, solar cells / solar cell modules or, as the case may be, photo-voltaic applications, is situated, to the effect that the imported goods have been used in the manufacture of the said wafers, cells or, as the case may be, photo-voltaic applications; (c) the importer shall pay on demand, in the event of his failure to comply with the above conditions, an amount equal to the difference between the duty leviable on such quantity of the imported goods but for the exemption under this notification and that already paid at the time of importation. 29 If the importer at the time of import- (1) furnishes a certficate from an officer not below the rank of a Deputy Secretary to the Government of India in the Department of Atomic Energy or a Director in the Department of Electronics of the Government of India, to the effect that imported goods (in respect of description, quantity and technical specifications) are required for the manufacture of laser and laser based instrumentation; and (2) furnishes an undertaking to the Assistant Commisioner of Customs to the effect that the imported goods shall be used for the above purpose and he shall pay, on demand, in the event of his failure to use the imported goods for the above purpose, an amount equal to the difference between the duty leviable on such quantity of the imported goods but for the exemption under this notification and that already paid at the time of importation. 30 If the importer produces to the Assistant Commissioner of Customs at the time and place of importation,- (i) a certificate issued by an officer not below the rank of a Deputy Principal Information Officer in the Press Information Bureau in the Ministry of Information and Broadcasting to the effect that the importer is an accredited news agency; and (ii) an undertaking to the effect that the imported goods shall remain in possession, control and use of the agency and shall not be sold or parted with for a period of five years from the date of importation.