Do I need to end date and create a new Transaction Tax Applicability Rule if I have a new tax rate?

Summary:

In Canada, the province of Nova Scotia is changing their HST tax rate from 15% to 14% on April 1, 2025 and I need to implement this in Oracle ERP.

Content (please ensure you mask any confidential information):

Our tax rates are created as HST_13 & HST_15, so I have created a new tax rate called HST_14 because different provinces have different rates.

In the Transaction Tax Applicability Rules there is an HST_Rate_Rule that looks like this:

I can't edit the Nova Scotia (HST) line and link it to HST_14 effective April 1, 2025. Is there a way to do that?

Or do I need to end date the whole rule and set it up again? If this is the case, is there any way to copy the rule and make the change?