Exception. A public agency would not be deemed to have knowledge under paragraph (b) of this section if -
(1) The parent of the child -
(i) Has not allowed an evaluation of the child pursuant to §§ 300.300 through 300.311; or
(ii) Has refused services under this part; or
(2) The child has been evaluated in accordance with §§ 300.300 through 300.311 and determined to not be a child with a disability under this part.
34 CFR § 300.534
General. A child who has not been determined to be eligible for special education and related services under this part and who has engaged in behavior that violated a code of student conduct, may assert any of the protections provided for in this part if the public agency had knowledge (as determined in accordance with paragraph (b) of this section) that the child was a child with a disability before the behavior that precipitated the disciplinary action occurred.