What is the time of supply, where supply is completed after to change in rate of tax?

hellloooooo

In such cases time of supply will be
(i) where the payment is received after the change in rate of tax but the invoice has been issued prior to the change in rate of tax, the time of supply shall be the date of receipt of payment; or
(ii) where the invoice has been issued and the payment is received before the change in rate of tax, the time of supply shall be the date of receipt of payment or date of issue of invoice, whichever is earlier; or

(iii) where the invoice has been issued after the change in rate of tax but the payment is received before the change in rate of tax, the time of supply shall be the date of issue of invoice