23 C.F.R. § 1327.1
This part provides procedures for States to participate in the National Driver Register (NDR) Problem Driver Pointer System (PDPS) and for other authorized parties to receive information from the NDR. It includes, in accordance with section 204(c) of the NDR Act of 1982 (Pub. L. 97-364 ), procedures for a State to notify the Secretary of Transportation of its intention to be bound by the requirements of section 205 of the Act (i.e., requirements for reporting by chief driver licensing officials) and for a State to notify the Secretary in the event it becomes necessary to withdraw from participation. The rule also contains the conditions for becoming a participating State as well as conditions and procedures for other authorized users of the NDR.
23 C.F.R. §1327.1