(a) If, after administration has been granted upon an estate, a will of the deceased be found and proved, the letters of administration shall be revoked and letters testamentary or of administration with the will annexed shall be issued; and if, after a will has been proven and letters testamentary or of administration with the will annexed have been issued thereon, the will is set aside, declared void or inoperative, such letters shall be revoked and letters of administration issued.
(b) Any heir, legatee, devisee, creditor, or other person interested in the estate may apply for the removal of an executor or administrator who has become of unsound mind or been convicted of any felony or a misdemeanor involving moral turpitude, or who has in any way been unfaithful to or neglectful of his trust, to the probable loss of the applicant. The application shall be by petition and upon notice to the executor or administrator, and if the court finds the charge to be true it shall make an order removing the executor or administrator, and revoke his letters.
(c) Whenever it appears probable to the court that any of the causes for removal of an executor or administrator exist or have transpired, as specified in subsection (b) of this section, the court shall cite the executor or administrator to appear and show cause why he should not be removed, and if he fails to appear or show sufficient cause an order shall be made removing him and revoking his letters; and the court shall exercise a supervisory control over the executor or administrator, to the end that he faithfully and diligently perform the duties of his trust according to law.
(d) If any executor or an administrator becomes a nonresident of this territory, he may be removed and his letters revoked in the manner prescribed in subsection (b) of this section, except that the notice may be given by publication or posting for such time as the court directs.
(e) If a nonresident or minor qualifies as executor upon becoming a resident or reaching majority and if, in the meantime, an administrator with the will annexed has been appointed, his powers and duties cease with the qualification of such executor; but if another executor has qualified and is acting as such they thereby become joint executors.