61 STAT.] 80TH CONG., 1ST SESS.-CH. 512-AUG. 7 , 1947 commander in the Nurse Corps shall be made from among officers whose names appear on the promotion list for the grade concerned. When so promoted each such officer shall have the same date of rank which has been, or in due course will be, given the line officer who is to be his or her running mate in the grade to which promoted, but no increased pay or allowances shall accrue to any such officer by virtue of his promotion prior to the date of occurrence of the vacancy which he is promoted to fill or prior to the date of his selection for promotion, whichever shall be later. (b) The names of officers recommended by a board for promotion to the grade of rear admiral, and approved by the President, shall be placed upon a promotion list and promotions to fill vacancies shall be made from officers whose names appear on the promotion list: Provided,That when so promoted each such officer shall have the same date of rank which has been given to the running mate assigned him in the grade to which he is promoted: Provided further, That if such running mate shall not have been promoted, the staff officer shall be given as his date of rank the date of the occurrence of the vacancy which he is promoted to fill until such running -mate shall have been promoted to the grade of rear admiral, at which time the staff officer shall be given a new commission with the same date of rank given to such running mate: And provided further, That each staff officer promoted to the grade of rear admiral shall be entitled to the pay and allowances of that grade only from the date of occurrence of the vacancy which he is promoted to fill. (c) The President may remove the name of any officer from the promotion list. An officer whose name is so removed from the promo- tion list or one whose appointment is rejected by the Senate, shall continue to be eligible for consideration for recommendation for promotion: Provided, That the next ensuing selection board may recommend the officer concerned for promotion, and thereupon, with the approval of the President, the name of such officer shall be replaced on the promotion list, without prejudice by reason of its having been temporarily removed therefrom, and when promoted such officer shall take the same lineal rank and date of rank that he would have had had his name not been so removed: And provided further, That if such officer is not so recommended by such next ensuing selection board or if the President shall again remove his name from the promotion list or if the Senate shall again reject his appointment, he shall be held for all purposes to have twice failed of selection for promotion. (d) Line and staff officers of the Navy, when of the same grade, shall take precedence with all other line and staff officers of the same grade from the dates of rank stated in their commissions in said grade: Provided, That officers serving in the same grade and having the same date of rank in that grade shall take precedence in the following order: (a) Line officers, (b) medical officers, (c) supply officers, (d) chaplains, (e) civil engineers, (f) dental officers, (g) officers of the Medical Service Corps, and (h) officers of the Nurse Corps. (e) (1) Lieutenants (junior grade) in a staff corps, appointed sub- sequent to the approval of this Act pursuant to any authority other than the Act of April 18, 1946 (Public Law 347, Seventy-ninth Con- gress), with date of rank in that grade in the same calendar year shall, in order of their lineal rank and following December 31 of that year, be assigned running mates among line lieutenants (junior grade) with dates of rank in the same calendar year, if of other than the Medical Corps, and in the preceding calendar year if of the Medical Corps, in the manner herein prescribed. Each such staff officer shall be assigned 823 Rear admirals. Removal from pro- motion list. Replacement. Precedence of line and staff officers. Assignment of run- ning mates. 60 Stat. 92. 34U.S.C.§2dset. Ante, p. 738; poet pp. 867,877.