; or (3) when the appointment officer determines that the officer who received the appointment has engaged in misconduct or has displayed substandard performance. (g) Limitation on number of eligible positions An appointment under this section may only be made for service in a position designated by the Secretary for the purposes of this section. The number of positions so designated may not exceed the following percentages of the respective grades: (1) As lieutenant, 0.5 percent. (2) As lieutenant commander, 3.0 percent. (3) As commander, 2.6 percent. (4) As captain, 2.6 percent. . (b) Clerical amendment The analysis at the beginning of such chapter is amended by adding at the end the following new item: 2130. Promotion to certain grades for officers with critical skills: captain, commander, lieutenant commander, lieutenant. . 4. Career intermission program (a) In general Subchapter I of chapter 25 of title 14, United States Code, is amended by adding at the end the following: 2514. Career flexibility to enhance retention of members (a) Programs authorized The Commandant may carry out a program under which members of the Coast Guard may be inactivated from active service in order to meet personal or professional needs and returned to active service at the end of such period of inactivation from active service. (b) Period of inactivation from active service