(a) All state agencies and contractors participating in the provision of early intervention services under this chapter shall cooperate with the Department and Interagency Coordinating Council to ensure effective system implementation, coordination, and nonduplication of activities.
(b) The IFSP under § 3107A of this title serves as the primary comprehensive service plan for all cooperating agencies and contractors and must be accorded deference in determining the developmental, educational, and medical necessity of included early intervention services.