4. Determination of point of taxation in case of change in effective rateof tax
Notwithstanding anything contained in rule 3, the point of taxation in cases where there is a change in effective rate of tax in respect of a service, shall be determined in the following manner, namely:-(a) in case a taxable service has been provided before the change in effective rate of tax,-
(i) where the invoice for the same has been issued and the payment received after the change in effective rate of tax, the point of taxation shall be date of payment or issuing of invoice, whichever is earlier; or
(ii) where the invoice has also been issued prior to change in effective rate of tax but the payment is received after the change in effective rate of tax, the point of taxation shall be the date of issuing of invoice; or
(iii) where the payment is also received before the change in effective rate of tax, but the invoice for the same has been issued after the change in effective rate of tax, the point of taxation shall be the date of payment;
(b) in case a taxable service has been provided after the change in effective rate of tax,-
(i) where the payment for the invoice is also made after the change in effective rate of tax but the invoice has been issued prior to the change in effective rate of tax, the point of taxation shall be the date of payment; or
(ii) where the invoice has been issued and the payment for the invoice received before the change in effective rate of tax, the point of taxation shall be the date of receipt of payment or date of issuance of invoice, whichever is earlier; or
(iii) where the invoice has also been raised after the change in effective rate of tax but the payment has been received before the change in effective rate tax, the point of taxation shall be date of issuing of invoice.