I found this link to a summary of the changes in IDEA that went into effect in 2005:

http://www.wrightslaw.com/idea/law.htm (link to the IDEA 2004 wording about evaluations and IEPs)


Under this heading: IDEA 2004 Statute - Changes in Key Statutes
Click on the link for:
IDEA 2004: Section 1414- Evaluations, Reevaluations and IEPs
Scroll down to page 6. There is information there about using the tests and other information provided by the parent. It's a section called Review of Existing Evaluation Data.
(sorry but I couldn't get the link to copy and paste!)

I think you can use this to advocate for the fact that the existing data you have clearly demonstrates the need and that putting her through further testing is not appropriate due to her responses to testing and the time it would take to complete the testing delaying services. I don't think there is anything in the law that says they *can't* request their own testing but you can certainly advocate that it is just not necessary. And they can't do the testing without your consent.

I would try the local Center For Independent Living that serves your area for an educational advocate:
http://www.incil.org/locations.asp
enter in your county of residence and find the CIL that serves you. Their services are free. If they don't have a youth advocate on staff they should be able to provide you with a resource of advocates. If the agency serving your county can't help then call the next closest one.

Hope this helps in your advocacy!