34 C.F.R. §300.346.  Development, review, and revision of IEP.

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(d) Requirement with respect to regular education teacher. The regular education teacher of a child with a disability, as a member of the IEP team, must, to the extent appropriate, participate in the development, review, and revision of the child's IEP, including assisting in the determination of--

(1) Appropriate positive behavioral interventions and strategies for the child; and
(2) Supplementary aids and services, program modifications or supports for school personnel that will be provided for the child, consistent with Sec. 300.347(a)(3).