Central Govt had notified Point of Taxation Rules under Section 94 of the Finance Act
Section 94(a) pertains to collection and recovery of service tax
Section 94(hhh) relates to the date for determination of rate of service tax.
Now (From 14 May 2016)
Point of Taxation are notified under section 67A(2) of the Finance Act, 1994
As per Section 67A(2),Central Govt has the power to make rules regarding the point in time with respect to rate of service tax.