PUBLIC LAW--CH. 512-AUG. 7 , 1947 Temporaryappoint. An officer holding a permanent appointment in one grade and a temporary appointment in a higher grade shall, for this purpose, be held to be serving in the higher grade: Provided,That an officer serving under a temporary appointment, including a temporary appointment Pot, pp. 875,878. under section 413 or section 415 of this Act, in a grade to which appointed for a period of limited duration shall, for purposes of eligibility for selection, promotion, and involuntary retirement, be deemed to be serving in the grade he would hold were he not serving under such appointment. (c) The following personnel may be temporarily appointed to grades in the Regular Navy or Marine Corps, except in the Nurse Corps of the Regular Navy, including the grades of warrant officer and commissioned warrant officer, not above lieutenant in the Navy and captain in the Marine Corps: (1) Commissioned warrant officers of the Regular Navy and Marine Corps. (2) Warrant officers of the Regular Navy and Marine Corps. (3) First-class petty officers and above in the Regular Navy and staff sergeants and above in the Regular Marine Corps. (d) Officers on the active list of the Regular Navy or Marine Corps in commissioned grades, including those appointed under the authority of subsection (c of this section, may be temporarily appointed to higher grades in the Regular Navy or Marine Corps. Permanent, paroba (e) The permanent, probationary, or acting appointments of those tionary, and acting appointments. persons temporarily appointed in accordance with the provisions of this title shall not be vacated by reason of such temporary appoint- ments, such persons shall not be prejudiced thereby in regard to pro- motion, advancement, or appointment in accordance with laws relating to the Regular Navy or Marine Corps, and their rights, benefits, privi- leges, and gratuities shall not be lost or abridged in any respect what- ever by their acceptance of commissions or warrants hereunder: Pro- vided, That, except as otherwise provided herein, no person who shall accept a temporary appointment under the provisions of this title shall, while serving thereunder, be entitled to pay or allowances except as provided by law for the position temporarily occupied: And pro- vided further,That no person temporarily appointed under the author- ity of this section shall suffer any reduction in pay and allowances to which he was entitled by virtue of his permanent status at the time of such temporary appointment nor shall he suffer any reduction in pay and allowances to which he was entitled under a prior temporary appointment in a lower grade. norm atty. (f) Enlisted men shall, upon being initially appointed as provided Nbeof tem by this section, be paid the sum of $250 as a uniform gratuity. raryapointments. (g) The temporary appointments under the authority of subsec- tion (c) of this section shall be in such numbers as the President may determine that the needs of the service require but not to exceed, in each case, the difference between the actual number of officers in the line and m each staff corps holding permanent appointments on the active list of the Regular Navy and the authorized number of such officers. vax ilitytoeN- (h) The provisions of this section shall apply to personnel of the Naval Reserve (except the Fleet Reserve, and personnel of the Naval Reserve ordered to active duty in connection with organizing, admin- istering, recruiting, instructing, training, or drilling the Nava Reserve, or ordered to temporary active duty for the purpose of prosecuting special work), when on active duty, in like manner and to the same extent and with the same relative conditions in all respects as are pro- vided for personnel of the Regular Navy and Marine Corps, but this shall not be construed to authorize the temporary appointment of the personnel thereof to grades in the Regular Navy or Marine Corps. 830 [61 STAT.