The personal representative shall give written notice in accordance with paragraph (2) of this subsection to each creditor who has filed a claim under § 8–104 of this article which is still open and to all interested persons of a claim, petition, or other request which could result, directly or indirectly, in the payment of a debt, commission, fee, or other compensation to or for the benefit of the personal representative or the attorney for the estate. The notice shall: State the amount requested; Set forth in reasonable detail the basis for the request; and State that a request for hearing may be made within 20 days after the notice is sent. Unless there was fraud, material mistake, or substantial irregularity in the proceeding, or a request for a hearing is filed within 20 days of the sending of the notice, any action taken by the court on the petition is final and binding on all persons to whom the notice was given. A certification by independent counsel as to the reasonableness of the amount of the payment is not required.