As you are aware, exports of goods & services can be made without payment of integrated tax under provisions of Rule 96A of CGST Rules. Under the said provisions, an exporter is required to furnish a Bond or LUT to the jurisdictional Commissioner before effecting zero rated exports/supplies.
As per the Circular No. 8/8/2017-GST dated 04.10.2017, the LUT shall be valid for the whole Financial Year in which it is tendered. Thus, the LUT obtained during FY 2017-18 shall be valid till 31st March, 2018. Exporters who intend to export under LUT are advised to submit fresh LUT for exports w.e.f. 01.04.2018.
All concerned exporters are advised to act accordingly to avoid any inconvenience in exporting the goods.
Source- FIEO Letter to Its Members