Question about how to recalculate the time period conflict after a date change?

Hello Experts,

Current process: The current process is that when there is an RFC (change) is entered into HPSM, there is a rule set that looks at the scheduled implementation start and end dates. This rule set will then compare the dates entered compared to the Time Period Freeze. If the dates are during the dates that there is a freeze there will be an additional approval required (CIO).

Proposed process: We would like to continue the current process but if there is a change in the dates of the RFC that is now outside of the Time Period Freeze we would like to recalculate the time period freeze to not include the additional approval of CIO.

This is what I need help with.