Section 16(b) in Tamil Nadu Transparency in Tenders Act, 1998
(b)available from a single source only from a supplier or cases in which a particular supplier or contractor has exclusive rights in respect of the goods or services or construction and no reasonable alternative or substitute exists or where the procuring entity having procured goods, equipment, technology from a supplier or contractor determines that additional supplies must be procured from that specific supplier or contractor for reasons of standardization and compatibility with the existing goods, equipment or technology:
