The term “developmental disability” means a severe, chronic disability of a person that:

(1)  Is attributable to a mental or physical impairment or combination of mental and physical impairments;

(2)  Is manifested before the person attains age twenty-two (22);

(3)  Is likely to continue indefinitely;

(4)  Results in substantial functional limitations in three (3) or more of the following areas of major life activity:

(i)  Self-care;

(ii)  Receptive and expressive language;

(iii)  Learning;

(iv)  Mobility;

(v)  Self-direction;

(vi)  Capacity for independent living; and

(vii)  Economic self-sufficiency; and

(5)  Reflects the person’s need for a combination and sequence of special, interdisciplinary, or generic care, treatment, or other services that are of lifelong or extended duration and are individually planned and coordinated.