20 U.S.C. § 923a: Enrollment of certain additional children on tuition-free basis

the children of full-time, locally-hired employees of the Department of Defense in an overseas area if such employees are citizens or nationals of the United States; and the Supreme Headquarters Allied Powers, Europe, but only in a school of the defense dependents’ education system in Mons, Belgium; or the United Nations Command, but only in a school of the defense dependents’ education system in South Korea or Japan. The Secretary may use funds available for the defense dependents’ education system to provide for the education of children enrolled in the defense dependents’ education system under subsection (a). In the regulations required by subsection (a), the Secretary shall prescribe a methodology based on the estimated total number of dependents of sponsors under section 932(2) of this title enrolled in schools of the defense dependents’ education system described in paragraph (2) of subsection (a) to determine the number of children described in that paragraph who will be authorized to enroll under such subsection. The Secretary shall prescribe such methodology with the advice and assistance of the commanders of the geographic combatant commands with jurisdiction over the locations described in paragraph (2) of subsection (a). If the number of children described in paragraph (2) of subsection (a) who seek enrollment in schools of the defense dependents’ education system exceeds the number authorized by the Secretary under paragraph (1), the Secretary may enroll the additional children on a space-available, tuition-free basis notwithstanding section 923(d)(2) of this title .