A. 1. Individuals with intellectual disability who are legal residents of this state and who have a mental age not above that of the average nine-year-old child, as determined by psychological examination, may be admitted to an institution named in Section 1406 of this title or provided community services, if available, on a voluntary basis only upon written application to the Director on forms provided for such purpose. Other individuals with intellectual disability who are residents of this state and who are above such mental age may be admitted or provided community services, on a voluntary basis only, upon recommendation of the superintendent of the institution and approval of the Director.

2. The application shall be signed by any parent having legal custody of such person, a guardian appointed by a court, or other legal custodian of such person.

3. The psychological examination provided for in this section shall be on forms provided by the Department and must be completed before an application can be approved and the applicant admitted to the institution.