Code of Federal Regulations Title 34. Education § 34.300.303 Reevaluations

(1) If the public agency determines that the educational or related services needs, including improved academic achievement and functional performance, of the child warrant a reevaluation;  or

(2) If the child's parent or teacher requests a reevaluation.

(1) May occur not more than once a year, unless the parent and the public agency agree otherwise;  and

(2) Must occur at least once every 3 years, unless the parent and the public agency agree that a reevaluation is unnecessary.