authorization approval rule where the request date is less than 30 days from submission date

Summary:

We are defining custom worflow approval rules for spend authorization.

One of the client requirement is if the authorization request date is less than 30 days from the submission date, it should route to the CFO.

My question is how to write the condition for authorization date is less than 30 days from submission date in BPM?

Should I use a nested or negated or variable test to achieve this?

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