Infrastructure Sterlite says it has sought TNPCB permission for reopening Updated : December 21, 2018 11:59 AM IST Sterlite Chief Executive Officer P Ramnath said after getting the TNPCB permission, it would take about two months for making the plant operational. "We have already approached the TNPCB. As per the NGT order, they (TNPCB) have been given three weeks to renew the consent. We have also made our request to the TNPCB," he told reporters. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.