Which date/set of data should drive the timing of the 3 year eval-original or IEE?
The original school evaluation date (April 2022) drives the 3-year reevaluation timeline, not the date of the IEE: IDEA Regulations – IDEA 34 CFR §300.303, / PA Chapter 14 Regulations
Are they required to compare any new evaluations to the IEE neuropsych data in the IEP or PLOP?
Yes, if the IEE was accepted in full or in part and used to determine eligibility and develop the IEP. The school must consider that data when reviewing progress or conducting future evaluation: IDEA 34 CFR §300.502
If he doesn’t qualify, or if the school doesn’t conduct a comprehensive evaluation, can you request another IEE? Do services continue during that process?
Yes, you can request another IEE if the district’s reevaluation is insufficient or you disagree with the results. Services continue during this process under "stay-put" protections: IDEA 34 CFR §300.502 and §300.518 / Office for Dispute Resolution (ODR) – IEE and Due Process Guidance
