Sec. 300.321 (e) (2)

(2) A member of the IEP Team described in paragraph (e)(1) of this section may be excused from attending an IEP Team meeting, in whole or in part, when the meeting involves a modification to or discussion of the member’s area of the curriculum or related services, if—

(i) The parent, in writing, and the public agency consent to the excusal; and
(ii) The member submits, in writing to the parent and the IEP Team, input into the development of the IEP prior to the meeting.