The term "extended services" means ongoing support services and other appropriate services, needed to support and maintain an individual with a most significant disability in supported employment, that ‑‑
(A) are provided singly or in combination and are organized and made available in such a way as to assist an eligible individual in maintaining supported employment;
(B) are based on a determination of the needs of an eligible individual, as specified in an individualized plan for employment; and
(C) are provided by a State agency, a nonprofit private organization, employer, or any other appropriate resource, after an individual has made the transition from support provided by the designated State unit…