Employee can delete only past 30 days leave either approve or awaiting approval

Summary:

My client requirement is -Employee can delete only past 30 days leave either approve or awaiting approval. HR Admin can delete any leave in the system. If I am using Lock if completed by employee feature. System is locking all the approved leaves. I need system should check 30 days rule.

Content (required):

My client requirement is -Employee can delete only past 30 days leave either approve or awaiting approval. HR Admin can delete any leave in the system. If I am using Lock if completed by employee feature. System is locking all the approved leaves. I need system should check 30 days rule.