entities described in this subparagraph are the following: (i) The Department. (ii) An entity that enters into a contract with the Secretary pursuant to subsection (n). (3) Intervention (A) In general Except as provided in subparagraph (B), a parent of an eligible military dependant student or a parent of a student on whose behalf a Military Education Savings Account is established may intervene in any legal proceeding in which the constitutionality of the program under this section is challenged under a State constitution or the Constitution of the United States. (B) Exception For purposes of judicial administration, a court may— (i) limit the number of parents allowed to intervene in a proceeding under subparagraph (A)