(a) General. Each public agency must ensure that the rights of a child are protected when--
(1) No parent (as defined in Sec. 300.30) can be identified;
(2) The public agency, after reasonable efforts, cannot locate a parent;
(3) The child is a ward of the State under the laws of that State; or
(4) The child is an unaccompanied homeless youth as defined in section 725(6) of the McKinney-Vento Homeless Assistance Act (42 U.S.C. 11434a(6)).
