International competitive bids are invited for the construction of the 230/115 kV Ubon Ratchathani 3 gas-insulated switchgear (GIS), 230 kV Yasothon and 230 kV Ubon Ratchathani 2 substations associated with the Transmission System Development in the area of Ubon Ratchathani Yasothon and Amnat Charoen Provinces for Power Purchase from the Lao PDR Project.