Sec. 300.300 (a) (2)

(2) For initial evaluations only, if the child is a ward of the State and is not residing with the child’s parent, the public agency is not required to obtain informed consent from the parent for an initial evaluation to determine whether the child is a child with a disability if—

(i) Despite reasonable efforts to do so, the public agency cannot discover the whereabouts of the parent of the child;
(ii) The rights of the parents of the child have been terminated in accordance with State law; or
(iii) The rights of the parent to make educational decisions have been subrogated by a judge in accordance with State law and consent for an initial evaluation has been given by an individual appointed by the judge to represent the child.