34 CFR § 300.507 - Filing a due process complaint.
(1) A parent or a public agency may file a due process complaint on any of the matters described in § 300.503(a)(1) and (2) (relating to the identification, evaluation or educational placement of a child with a disability, or the provision of FAPE to the child).
(2) The due process complaint must allege a violation that occurred not more than two years before the date the parent or public agency knew or should have known about the alleged action that forms the basis of the due process complaint, or, if the State has an explicit time limitation for filing a due process complaint under this part, in the time allowed by that State law, except that the exceptions to the timeline described in § 300.511(f) apply to the timeline in this section.
(1) The parent requests the information; or
(2) The parent or the agency files a due process complaint under this section.