(1) An executor by designation must notify the inheritor whether he will accept or decline the designation of executor without delay after the death of the testator.
(2) An executor by appointment must, upon receiving the notice of appointment, notify the court without delay whether he will accept or decline the appointment.
(3) The inheritor or any other interested person may, by fixing a reasonable period, give peremptory notice to the executor by designation or appointment to give a definite answer within such period as to whether he will accept or decline becoming an executor. If no definite answer to the peremptory notice has been received within such period, it shall be deemed that the executor has accepted designation or appointment as executor.