34 C.F.R. § 300.310
(b) The group described in § 300.306(a)(1), in determining whether a child has a specific learning disability, must decide to—
(c) In the case of a child of less than school age or out of school, a group member must observe the child in an environment appropriate for a child of that age.
(Authority: 20 U.S.C. 1221e-3; 1401(30); 1414(b)(6))