(A) In general.--A local educational agency shall ensure that a reevaluation of each child with a disability is conducted in accordance with subsections (b) and (c)--
(i) if the local educational agency determines that the educational or related services needs, including improved academic achievement and functional performance, of the child warrant a reevaluation; or
(ii) if the child's parents or teacher requests a reevaluation.
(B) Limitation.--A reevaluation conducted under subparagraph (A) shall occur--
(i) not more frequently than once a year, unless the parent and the local educational agency agree otherwise; and
(ii) at least once every 3 years, unless the parent and the local educational agency agree that a reevaluation is unnecessary.