Amendment to Service Tax notification substitutes April with July, postponing the effective month under delegated authority. Amendment to Notification No.07/2010-Service Tax substitutes the word 'April' with the word 'July' in paragraph 2 of the principal notification, effected by Notification No.19/2011-Service Tax under the delegated power conferred by section 93(1) of the Finance Act and grounded on satisfaction of public interest.