Filing deadline extension for sales-tax statements under sales and works-contract laws; deadline extended and other conditions unchanged. Dealers under the Delhi Sales Tax Act, 1975 must file Form ST-11A and dealers/works contractors under the Delhi Sales Tax on Works Contract Act, 1999 must file Forms XIII for assessment year 2004-05 by the last date of 16.01.2006; all other conditions of prior notifications dated 17.8.2005 remain unchanged and the notification is effective immediately.