(1) The executor is obliged to administer the estate in a proper manner.
(2) Directions for the administration that the testator has given by testamentary disposition are to be complied with by the executor. Upon application by the executor or by any other party concerned, they may, however, be cancelled by the probate court if compliance with them would substantially endanger the estate. Insofar as this is appropriate, the court as a rule is to hear the persons concerned prior to making a decision.