(4)Sentence of death shall not be carried into effect until the expiry of the period specified by the confirming authority under sub-rule (1) or if, within the period so specified, the person under sentence submits a petition against the finding or sentence of the Court-Martial, until the authority legally competent to dispose of such petition finally, after considering the petition, orders that the sentence of death may be carried into effect.][170-A. Death warrant.-(1) The officer commanding the army, army corps or division or an officer commanding forces in the field shall nominate a provost-marshal or other officer not below the rank of Lieutenant Colonel who shall be responsible for the due execution of the sentence of death passed under the Act; and shall issue to such officer the death warrant in the relevant form contained in Appendix V.