14 U.S.C. § 255 : US Code - Section 255: Number of officers to be selected for promotion

Search 14 U.S.C. § 255 : US Code - Section 255: Number of officers to be selected for promotion

Before convening a board under section 251 of this title to
recommend officers for promotion to any grade, the Secretary shall
determine the total number of officers to be selected for promotion
to that grade. This number shall be equal to the number of
vacancies existing in the grade, plus the number of additional
vacancies estimated for the next twelve months, less the number of
officers on the selection list for the grade.