(b) The total number of officers assigned to special duty only shall not exceed, at any one time a number equal to 25%o per centum of the total number of officers holding permanent appointments on the active list of the line of the Regular Navy at that time. (c) Officers assigned to special duty only shall be additional numbers in grade. They shall perform sea or shore duty appropriate to their special qualifications but shall not succeed to command except on shore and then only as authorized by the Secretary of the Navy. (d) Officers assigned to special duty only shall be described and known as officers designated for special duty. ASSIGNMENT OF OFFICERS TO ENGINEERING DUTY SEC. 402. (a) The first paragraph under the heading "Officers for Engineering Duty" of the Act of August 29, 1916 (39 Stat. 580), as amended by the Acts of May 11, 1928 (45 Stat. 498), and June 25, 1940 34US. C. 71. (54 Stat. 528), is hereby further amended to read as follows: "Officers of the line of the Navy not below the grade of ensign may, upon application, and with the approval of the Secretary of the Navy, be assigned to engineering duty only. Officers so assigned shall be additional numbers in grade. They shall perform sea or shore duty in the Navy, appropriate to their special qualification but shall not succeed to command except on shore and then only as authorized by the Secretary of the Navy." (b) The total number of officers assigned to engineering duty only shall not exceed, at any one time, a number equal to 4A per centum of the total number of officers holding permanent appointments on the active list of the line of the Regular Navy at that time. (c) Hereafter officers assigned to engineering duty only shall be described and known as officers designated for engineering duty. (d) Officers of the Marine Corps assigned to supply duty only shall be described and known as officers designated for supply duty. ASSIGNMENT OF OFFICERS TO AERONAUTICAL ENGINEERING DUTY SEC. 403. (a) Officers of the line of the Navy, including officers heretofore assigned to engineering duty only, not below the grade of ensign, may, upon application, and with the approval of the Secretary of the Navy, be assigned to aeronautical engineering duty only. (b) The total number of officers assigned to aeronautical engineering duty only shall not exceed, at any one time, a number equal to 2%o per centum of the total number of officers holding permanent appointments on the active list of the line of the Regular Navy at that time. (c) Officers assigned to aeronautical engineering duty only shall be additional numbers in grade. They shall perform sea or shore duty appropriate to their special qualifications but shall not succeed to command except on shore and then only as authorized by the Secretary of the Navy. (d) Officers assigned to aeronautical engineering duty only shall be described and known as officers designated for aeronautical engineering duty. ASSIGNMENT OF OFFICERS TO LIMITED DUTY Appointments by SEC. 404. (a) The President is authorized to permanently appoint in the Regular Navy, in commissioned grades not above the grade of commander; commissioned warrant officers; warrant officers; chief petty officers; and petty officers, first class, of the Regular Navy, for the performance of limited duty only in the technical fields indicated by their warrants or ratings. Such appointments shall be effected by and with the advice and consent of the Senate. 870 PUBLIC LAWS--CH. 512-AUG. 7 , 1947 [61 STAT.
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