What are developmental disabilities?
The term "developmental disability" means a severe, chronic disability of an individual five years of age or older that:
Is attributable to a mental or physical impairment or combination of physical and mental impairments;
Is manifested before the person attains the age of 22;
Is likely to continue indefinitely;
Results in substantial functional limitations in three or more of the following areas of major life activity:
- receptive and expressive language;
- capacity for independent living;
- economic self-sufficiency; and
Reflects the individual's need for a combination and sequence of special, interdisciplinary, or generic services, supports, or other assistance that is of lifelong or extended duration and is individually planned and coordinated; except that, such term, when applied to infants and young children means individuals from birth to age five, inclusive, who have substantial developmental delay or specific congenital or acquired conditions with a high probability of resulting in developmental disabilities if services are not provided.
This definition is both the federal definition included in the Council's authorizing legislation, as well as the State of Oklahoma definition. Note that this is a "functional" and not a "categorical" term.