; and (B) may not make an adverse determination on the retired grade of the officer until the officer has had a reasonable opportunity to respond regarding the basis of the reopening. (4) If a certification of the retired grade of an officer covered by subsection (c) is reopened, the Secretary concerned shall also notify the President and Congress of the reopening. (5) If the retired grade of an officer is reduced through the reopening of the officer's retired grade, the retired pay of the officer under chapter 71 of this title shall be recalculated, and any modification of the retired pay of the officer shall go into effect on the effective date of the reduction of the officer's retired grade. . (d) Effective date The amendments made by subsection (a) shall take effect on the date of the enactment of this Act, and shall apply with respect to officers who retire from the Armed Forces on or after that date. 517. Reduction in number of years of active naval service required for permanent appointment as a limited duty officer Section 5589(d) of title 10, United States Code, is amended by striking 10 years and inserting 8 years . 518. Repeal of original appointment qualification requirement for warrant officers in the regular Army (a) In general Section 3310 of title 10, United States Code, is repealed. (b) Clerical amendment The table of sections at the beginning of chapter 335 of such title is amended by striking the item relating to section 3310. 519. Uniform grade of service of the Chiefs of Chaplains of the Armed Forces The grade of service as Chief of Chaplains of the Army, Chief of Chaplains of the Navy, and Chief of Chaplains of the Air Force of an officer serving in such position shall be such grade as the Secretary of Defense shall specify. The grade of service shall be the same for service in each such position. 520. Written justification for appointment of Chiefs of Chaplains in grade below grade of major general or rear admiral (a) Chief of Chaplains of the Army Section 3036 of title 10, United States