Sec. 300.300 (b)

(b) Parental consent for services.

(1) A public agency that is responsible for making FAPE available to a child with a disability must obtain informed consent from the parent of the child before the initial provision of special education and related services to the child.
(2) The public agency must make reasonable efforts to obtain informed consent from the parent for the initial provision of special education and related services to the child.
(3) If the parent of a child fails to respond to a request for, or refuses to consent to, the initial provision of special education and related services, the public agency—
(i) May not use the procedures in subpart E of this part (including the mediation procedures under §300.506 or the due process procedures under §§300.507 through 300.516) in order to obtain agreement or a ruling that the services may be provided to the child;
(ii) Will not be considered to be in violation of the requirement to make FAPE available to the child because of the failure to provide the child with the special education and related services for which the parent refuses to or fails to provide consent; and
(iii) Is not required to convene an IEP Team meeting or develop an IEP under §§300.320 and 300.324 for the child.
(4) If, at any time subsequent to the initial provision of special education and related services, the parent of a child revokes consent in writing for the continued provision of special education and related services, the public agency—
(i) May not continue to provide special education and related services to the child, but must provide prior written notice in accordance with §300.503 before ceasing the provision of special education and related services;
(ii) May not use the procedures in subpart E of this part (including the mediation procedures under §300.506 or the due process procedures under §§300.507 through 300.516) in order to obtain agreement or a ruling that the services may be provided to the child;
(iii) Will not be considered to be in violation of the requirement to make FAPE available to the child because of the failure to provide the child with further special education and related services; and
(iv) Is not required to convene an IEP Team meeting or develop an IEP under §§300.320 and 300.324 for the child for further provision of special education and related services.