The National Endowment for the Humanities will withdraw or exhaust the supply of all materials bearing the photograph and biographical information of a missing child within a three month period from the date the National Center for Missing and Exploited Children receives notice that the child has been recovered or that the parents or guardian of the child have revoked permission to use the information. The National Center for Missing and Exploited Children will be responsible for immediately notifying the agency contact, in writing, of the need to withdraw or remove this material.