Thanks for the question, Kitty. It sounds like you might see children in EI through a school system? The federal Part C requirement for the 45-day timeline only applies to initial eligibility for early intervention (birth to three). It sounds like the child you describe has already been found eligible for EI since he/she is currently being served. If the child is then later suspected of having ASD, there is no federal timeline for determining or ruling out the ASD diagnosis. Hopefully, that evaluation process won’t take too long, though, given the anxiety it can produce for families. Sometimes, local programs can have timeline goals (in addition to the federal requirements) so be sure to double check with your program to make sure there isn’t a different timeline for the ASD evaluation. Hope this helps!