Duty Entitlement Pass Book validity extended - amendment deems passes valid until month end when expiry falls earlier. The amendment inserts a proviso to Notification No. 34/97-Cus condition (iv) deeming a Duty Entitlement Pass Book valid until the last day of the month when its expiry falls before that day, and substitutes the phrase 'Provided further that' for 'Provided that' in the following proviso.