When the above notification come into force in the official gazette.
Notification No. 7/2008-Service Tax
Central Government issued Notification No. 18/2008 - Service Tax, published in the Gazette of India as an extraordinary notification, appointing a specific commencement date for the provisions of the Finance Act, 2008 relating to service tax and thereby bringing those statutory provisions into force by executive notification. (AI Summary)
TaxTMI