(E) Decision of hearing officer.--
(i) In general.--Subject to clause (ii), a decision made by a hearing officer shall be made on substantive grounds based on a determination of whether the child received a free appropriate public education.
(ii) Procedural issues.--In matters alleging a procedural violation, a hearing officer may find that a child did not receive a free appropriate public education only if the procedural inadequacies--
(I) impeded the child's right to a free appropriate public education;
(II) significantly impeded the parents' opportunity to participate in the decisionmaking process regarding the provision of a free appropriate public education to the parents' child; or
(III) caused a deprivation of educational benefits.
(iii) Rule of construction.--Nothing in this subparagraph shall be construed to preclude a hearing officer from ordering a local educational agency to comply with procedural requirements under this section.