PUBLIC LAWS-CH. 512-AUG. 7 , 1947 Captainsdesignated for engineering or spe- cial duty. Post, p. 858. Promotion zones. Officers not restrict- ed in duty. Officers below grade of captain designated for engineering duty, etc. Officers designated for limited duty. Normal terms of servie. this Act, which it is estimated will remain on the active list at the end of the current fiscal year: Provided, That the number to be so furnished shall not be less than 50 per centum of the number of rear admirals, exclusive of those who have once failed of selection for such continuation, eligible for consideration by the board for continuation on the active list. (9) The number to be furnished the board in respect to captains designated for engineering duty, aeronautical engineering duty, or special duty to be continued on the active list shall be such a number in each case not to exceed in each instance the number prescribed in section 312 of this title, as the Secretary of the Navy shall determine to be necessary to meet the requirements of the Navy. (10) The promotion zone in any grade for officers not restricted in the performance of duty, shall be established by the Secretary of the Navy as of the date of the convening of a selection board to consider officers of that grade for recommendation for temporary promotion to the next higher grade. It shall consist of that number of the most senior such officers of the grade under consideration, who are eligible for selection for temporary promotion to the next higher grade and have not previously failed of such selection, which must be either selected for temporary promotion by the particular board or be con- sidered as having failed of such selection, in order to maintain a flow of promotion consistent with the terms of service set out in paragraph (13) of this subsection and to best assure to individuals in succeeding years equality of opportunity for temporary promotion. The num- ber shall be determined by the Secretary of the Navy and shall be based upon a consideration of the estimated number of vacancies which will occur in the next higher grade for each of the ensuing five years, the number of such officers who will be eligible for selection, and the terms of service which they will have completed. (11) The promotion zones in any grade, below that of captain, for officers designated for engineering duty, for officers designated for aeronautical engineering duty, and for officers designated for special duty, shall each be composed of all officers of each such designation in the grade who have not previously failed of selection to the next higher grade and who are senior to the junior officer in the promotion zone determined as provided in paragraph (10) of this subsection. (12) The promotion zone in any grade for officers designated for limited duty, shall be established by the Secretary of the Navy as of the date of the convening of a selection board to consider officers of that grade for recommendation for temporary promotion to the next higher grade. It shall consist of that number of the most senior such officers of the grade under consideration, who are eligible for selection for temporary promotion to the next higher grade and have not previously failed of such selection, which must be either selected for temporary promotion by the particular board or be considered as having failed of such selection, in order to maintain a flow of promotion consistent with the terms of service set out in paragraph (14) of this subsection and to best assure to individuals in succeeding years equality of oppor- tunity for temporary promotion. The number shall be determined by the Secretary of the Navy and shall be based upon a consideration of the estimated number of vacancies which will occur in the next higher grade for each of the ensuing five years, the number of such ocers who will be eligible for selection, and the terms of service which they will have completed. (13) The normal terms of service of officers, others than officers designated for limited duty, in the various grades below rear admiral sha be: 846 [61 STAT.
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