As used in this chapter, unless the context requires a different meaning: “Board” means the Board of Trustees of the Virginia Retirement System. “Eligible employee” means any turnaround specialist or member of the middle school teacher corps providing services for a participating public school division pursuant to subsections E and F of § 22.1-199.1. “Participating employer” means any local public school board that offers and pays the costs of improved retirement benefits as described in subsections E and F of § 22.1-199.1. “Plan” means the defined contribution plan established pursuant to this chapter and the provisions of § 401 (a) of the Internal Revenue Code of 1986, as amended. “Qualified participant” means an eligible employee of a participating employer.