34 C.F.R. § 303.342
(b) Periodic review.
(1) A review of the IFSP for a child and the child's family must be conducted every six months, or more frequently if conditions warrant, or if the family requests such a review. The purpose of the periodic review is to determine—
(d) Accessibility and convenience of meetings.
(1) IFSP meetings must be conducted—
(e) Parental consent. The contents of the IFSP must be fully explained to the parents and informed written consent, as described in § 303.7, must be obtained, as required in § 303.420(a)(3), prior to the provision of early intervention services described in the IFSP. Each early intervention service must be provided as soon as possible after the parent provides consent for that service, as required in § 303.344(f)(1).
(Authority: 20 U.S.C. 1435(a)(4), 1436)