67A. Date of determination of rate of tax, value of taxable service and rate of exchange
(1) The rate of service tax, value of a taxable service and rate of exchange, if any, shall be the rate of service tax or value of a taxable service or rate of exchange, as the case may be, in force or as applicable at the time when the taxable service has been provided or agreed to be provided.
Explanation.— For the purposes of this section, “rate of exchange” means the rate of exchange determined in accordance with such rules as may be prescribed.
(2) The time or the point in time with respect to the rate of service tax shall be such as may be prescribed.