Public agencies in the State of Arkansas may use whatever state, local, federal, and private sources of support are available in the State to meet the requirements of this part. Nothing herein relieves an insurer or similar third party from an otherwise valid obligation to provide or to pay for services provided to a child with a disability. Public agencies must ensure that there is no delay in implementing a child's IEP, including any case in which the payment source for providing or paying for special education and related services to the child is being determined.