Iowa Admin. Code r. 281-41.25
"Infant or toddler with a disability" means an individual under three years of age who needs early intervention services either because the individual has a condition, based on informed clinical opinion, known to have a high probability of resulting in later delays in growth and development if early intervention services are not provided; or the individual has a developmental delay, which is a 25 percent delay as measured by appropriate diagnostic instruments and procedures, based on informed clinical opinion, in one or more of the following developmental areas: cognitive development, physical development including vision and hearing, communication development, social or emotional development, or adaptive development.
Iowa Admin. Code r. 281-41.25