22 C.F.R. § 96.24
(b) To evaluate the agency's or person's eligibility for accreditation or approval, the accrediting entity must:
(c) The site visit(s) may include, but need not be limited to, interviews with birth parents, adoptive parent(s), prospective adoptive parent(s), and adult adoptee(s) served by the agency or person, interviews with the agency's or person's employees, and interviews with other individuals knowledgeable about the agency's or person's provision of adoption services. It may also include a review of on-site documents. The accrediting entity must, to the extent practicable, advise the agency or person in advance of the type of documents it wishes to review during the site visit. The accrediting entity must require at least one of the evaluators to participate in each site visit. The accrediting entity must determine the number of evaluators that participate in a site visit in light of factors such as: