ALL ITEMS OF MACHINERY INCLUDING PRIME MOVERS, INSTRUMENTS, APPARATUS AND APPLIANCES, CONTROL GEAR AND TRANSMISSION EQUIPMENT, AUXILIARY EQUIPMENT (INCLUDING THOSE REQUIRED FOR RESEARCH AND DEVELOPMENT PURPOSES, TESTING AND QUALITY CONTROL), AS WELL AS ALL COMPONENTS (WHETHER FINISHED OR NOT) OR RAW MATERIALS FOR THE MANUFACTURE OF THE AFORESAID ITEMS AND THEIR COMPONENTS, REQUIRED FOR THE INITIAL SETTING UP OF A UNIT, OR THE SUBSTANTIAL EXPANSION OF AN EXISTING UNIT, OF A SPECIFIED : (1) INDUSTRIAL PLANT, (2 IRRIGATION PROJECT, (3) POWER PROJECT, OTHER THAN SOLAR POWER PLANT OR SOLAR POWER PROJECT (4) MINING PROJECT, (5) PROJECT FOR THE EXPLORATION FOR OIL OR OTHER MINERALS, AND (6) SUCH OTHER PROJECTS, OTHER THAN SOLAR POWER PLANT OR SOLAR POWER PROJECT, AS THE CENTRAL GOVERNMENT MAY, HAVING REGARD TO THE ECONOMIC DEVELOPMENT OF THE COUNTRY NOTIFY IN THE OFFICIAL GAZETTE IN THIS BEHALF, AND SPARE PARTS, OTHER RAW MATERIALS (INCLUDING SEMI- FINISHED MATERIALS OF CONSUMABLE STORES) NOT EXCEEDING 10% OF THE VALUE OF THE GOODS SPECIFIED ABOVE, PROVIDED THAT SUCH SPARE PARTS, RAW MATERIALS OR CONSUMABLE STORES ARE ESSENTIAL FOR THE MAINTENANCE OF THE PLANT OR PROJECT MENTIONED IN (1) TO (6) ABOVE :