45 C.F.R. § 3.22 Request for identification.
Title 45 - Public Welfare
Upon request by a police officer, a person involved in any of the following situations must provide identification, for example, by exhibiting satisfactory credentials (such as an employment identification card or driver's license): (a) A traffic accident within the enclave; (b) The police officer reasonably believes that the individual is engaged in, or has engaged in, criminal conduct or a violation of the regulations of this part; or (c) The enclave or a portion of the enclave is not open to the public (see §3.41). A driver of a motor vehicle involved in an accident within the enclave shall also exhibit, upon the request of a police officer, the owner's registration card or other satisfactory proof of ownership.
Title 45: Public Welfare
PART 3—CONDUCT OF PERSONS AND TRAFFIC ON THE NATIONAL INSTITUTES OF HEALTH FEDERAL ENCLAVE
Subpart B—Traffic Regulations
§ 3.22 Request for identification.