Manage compensation plan access level by system dates

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Hello experts,

our customer wants to define plan access level (Updates Allowed and Updates Not Allowed) by dates and manager levels.

For example manager level 6 should have updates allowed by 15/11/2023 and after that date the plan should be set as Updates not allowed.

Manager level 5 should have updates allowed by 20/11/2023 and after that date the plan should be set as Updates not allowed and so on.

Is it possible to achieve it by Fast Formula? If not possible, based on your experience do you have a workaround to suggest?

Thanks in advance for your time!