Elia Transmission Belgium (ETB), part of Elia Group SA (<a href="https://live.euronext.com/en/product/equities/BE0003822393-XBRU" target="_blank">EBR:ELI</a>), is temporarily postponing the signing of the final high-voltage direct current (HVDC) contracts for Princess Elisabeth Island due to increased cost of the HVDC technology, the Belgian company said on Tuesday.