42 U.S.C. § 15096

(a) In general A State that receives a grant under section 15093 of this title shall use the funds made available through the grant to carry out systems change activities that accomplish the purposes of this subchapter. (b) Special rule In carrying out activities authorized under this subchapter, a State shall ensure that such activities address the needs of families of children with disabilities from unserved or underserved populations.