U.S Federal Regulations:
IDEA Sec. 300.111 Child find
https://sites.ed.gov/idea/regs/b/b/300.111
The State must have in effect policies and procedures to ensure that—
(i) All children with disabilities residing in the State, including children with disabilities who are homeless children or are wards of the State, and children with disabilities attending private schools, regardless of the severity of their disability, and who are in need of special education and related services, are identified, located, and evaluated; and
(ii) A practical method is developed and implemented to determine which children are currently receiving needed special education and related services.
Indiana Special Education Rules:
Article 7 511 IAC 7-40-1 Child Find
https://www.in.gov/doe/files/art-7-english-may-2019-update-index.pdf#page=56
Sec. 1. (a) The public agency shall establish, maintain, and implement written procedures that ensure the location, identification, and evaluation of all students three (3) years of age, but less than twenty-two (22) years of age, who are in need of special education and related services, regardless of the severity of their disabilities, including students who:
(1) have legal settlement within the jurisdiction of the public agency;
(2) attend a nonpublic school, are served by an agency, or live in an institution located within the jurisdiction of the public agency;
(3) are homeless students as defined at 511 IAC 7-32-46; (4) are wards of the state;
(5) are highly mobile students, including migrant students; and
(6) are suspected of being student