Customs exemption expiry under Customs Act: phased omission and substitution of obsolete tariff entries, with limited-duration application. The Central Government amends Notification No. 25/1999 Customs by inserting a sunset clause terminating the notification after 31st March, 2024, and by undertaking extensive omissions and substitutions in LIST A and LIST B to remove redundant or obsolete tariff exemption entries and to replace many entries with updated, specific product descriptions for components and inputs used in electronics and allied industries. The amendment is effective from 2nd February, 2022 and includes a corrigendum to a tariff descriptor.