Okla. Stat. tit. 70, § 70-13-123

A. The children eligible for entry into early intervention

services in the State of Oklahoma shall be infants and toddlers age

birth through two years (0-36 months) who are developmentally

delayed. As used in this act "developmentally delayed" means

children of the chronological age group specified in this section

who:

1. Exhibit a delay in their developmental age compared to their

chronological age of fifty percent (50%) or score two standard

deviations below the mean in one of the following areas or in a

subdomain of one of the following areas: cognitive, physical,

communication, social and emotional, or adaptive development;

Oklahoma Statutes - Title 70. Schools Page 627

2. Exhibit a delay in their developmental age compared to their

chronological age of twenty-five percent (25%) or score one and one-

half standard deviations below the mean in two or more of the

following areas or in a subdomain of two or more of the following

areas: cognitive, physical, communication, social and emotional, or

adaptive development; or

3. Have a diagnosed physical or mental condition that has a

high probability of resulting in delay. This includes, but is not

limited to: chromosomal disorders, neurological abnormalities,

inborn errors of metabolism, genetic disorders, congenital

malformation of the brain, congenital infections and sensory

abnormalities and impairments or identified syndromes.

B. The State Board of Education is authorized to modify and

redefine by regulation the eligibility definitions established in

subsection A of this section whenever such modification is required

to receive federal assistance under Part C of the Individuals with

Disabilities Education Act (IDEA), as may be amended.