In the negative list system all services are taxable and only those services that are
mentioned under negative list are exempted. Earlier all services were exempt from
service tax except those specifically mentioned in the act. So basically it is the other way round now.
The negative list is mentioned in Finance Act 2012. Relevant extracts of the same are
given below (see also the highlighted portion). However the Finance Act did not mention the date of implementation of the same, which was notified through Notification No. 19 /2012-Service Tax dated June 05, 2012.