(I) a child enrolls in a school served by the local educational agency after the relevant timeframe in clause (i)(I) has begun and prior to a determination by the child's previous local educational agency as to whether the child is a child with a disability (as defined in section 602), but only if the subsequent local educational agency is making sufficient progress to ensure a prompt completion of the evaluation, and the parent and subsequent local educational agency agree to a specific time when the evaluation will be completed; or