Ok---
I can tell you tons of things to say.
First off, don't take the schools BS about good grades--if he is entitled to the service he NEEDS TO GET IT.
The school basically will try to say "he's bright" and "he doesn't need it"
That is because the school district doesn't want to pay the extra funds for it.
I've had the same battle and it took 2 full school years to get an IEP. I actually had to almost "let" my son fail--so they could see it was impacted his education. I thought something wasn't right in 4th grade-- IEP was denied, 504 was denied. (That is technically illegal). 5th grade= same thing.
Mid-to end of 6th grade = The guidance counselor noticed that his grades were slipping and he had some issues with the office. She suggested that we revisit the IEP process and this time he qualified for services. His diagnose had to impact his educatoinal goals and it didn't until the 6th grade.
He is now in 7th grade-- and doing much better. He has wonderful classroom teachers and has a one period social and academic support class per day. Due to the block scheduling of his middle school, he only has the support class 4x a week.
I can give you NJ statutues but I don't think it can help you.
I will tell you to google IDEA (2004). There are many provisions to IDEA that can be used to a parental advantage. Also--if you say you want to issue the due process provision if they refuse-- that might light a fire in the CST office.
PM me if you want. As you can tell, I've been there, done that.