The measure has been extended "neccesary in the public interest" from 1.4.2018 to 31.3.2021 by Notification 51/2018 dated 9.7.2018: https://www.cbic.gov.in/resources//htdocs-cbec/customs/cs-act/notifications/notfns-2018/cs-tarr2018/cs51-2018.pdf;jsessionid=929BF35DE5793ACE1B7B851A23119EE5