Must an executor wait a specific amount of time before distributing cash disbursements from the estate?

Question Details:

My brother-in-law was named executor for both my parents. They have now passed, and he is stating that TN law requires him to wait 6 months from the date he filed for probate and was named executor by the court before he distributes any cash to the estate heirs. Is this true? If there is a specific waiting period, how long does the law say it has to be? Or is this just a recommendation rather than law? Important Notice