(b) Policy.--It is the policy of the United States to provide financial assistance to States--

(1) to develop and implement a statewide, comprehensive, coordinated, multidisciplinary, interagency system that provides early intervention services for infants and toddlers with disabilities and their families;

(2) to facilitate the coordination of payment for early intervention services from Federal, State, local, and private sources (including public and private insurance coverage);

(3) to enhance State capacity to provide quality early intervention services and expand and improve existing early intervention services being provided to infants and toddlers with disabilities and their families; and

(4) to encourage States to expand opportunities for children under 3 years of age who would be at risk of having substantial developmental delay if they did not receive early intervention services.