Railway reserves the right to procure the material only from Proven Sources having satisfactory past performance for tendered items in any Zonal Railways/PSU.The tenderers must upload documents pertaining to their past performance, in Zonal Railways/PSU viz, Inspection Certificates, R/Note copies receipt challans & other receipt documents as proof of supply along with their offer otherwise they shall be deemed to have no such past performance for the tendered item and the tender shall be decided accordingly however, railway reserves the right to also check the firms past performance in its own Rly. Purchase Order is not considered as performance until Railway get confirmation of supply against your attached PO. Para No. 2.6.1 of GCC attached may be referred to, for full details. Bidders are advised to read it carefully before bidding.