; and (2) make selections and recommendations to the Secretary and the President for the appointment, promotion, involuntary separation, continuation, and involuntary retirement of officers in the commissioned officer corps of the Administration as prescribed in this title. (d) Action on recommendations not acceptable If any recommendation by a board convened under subsection (a) is not accepted by the Secretary or the President, the board shall make such further recommendations as the Secretary or the President considers appropriate. . 303. Assistant Administrator of the Office of Marine and Aviation Operations Section 228 ( 33 U.S.C. 3028 ) is amended— (1) in subsection (c)— (A) the fourth sentence, by striking Director and inserting Assistant Administrator ; and (B) in the heading, by inserting Assistant Administrator of the before Office ; (2) in paragraph (2) of subsection (d), by inserting or immediately beginning a period of terminal leave before , revert to ; (3) by amending subsection (e) to read as follows: (e) Number of officers appointed The total number of officers serving on active duty at any one time in the grade of rear admiral (lower half) or above may not exceed five, with only one serving in the grade of vice admiral.