Each system must include the State's rigorous definition of developmental delay, consistent with §§ 303.10 and 303.203(c) , that will be used by the State in carrying out programs under part C of the Act in order to appropriately identify infants and toddlers with disabilities who are in need of services under part C of the Act. The definition must-
34 C.F.R. §303.111
Authority: 20 U.S.C. 1435(a)(1)
Approved by Office of Management and Budget under control number 1820-0550