(a) With informed written parental consent, confidential Part C records may be provided to the public schools when the child is enrolled in school. If the parent refuses to consent, confidential Part C records may not be intermingled with public school records, including records relating to special education.(b) An agency or provider may not, without informed prior written parental consent, redisclose confidential information obtained from another agency or provider, unless such redisclosure is permitted under the terms of the original disclosure made to the agency or provider.