Customs exemption extension for import of pulses prolonged, preserving duty-free treatment under existing notification framework Substitution of expiry date in the proviso to Notification No. 12/2012-Customs: the words '1st day of April, 2013' in clause (a) after the Table are replaced by '1st day of April, 2014', thereby extending the exemption from customs duty on import of pulses under the principal notification.