49 U.S. Code § 31312. Decertification authority
(a) In General.—If the Secretary of Transportation determines that a State is in substantial noncompliance with this chapter, the Secretary shall issue an order to—
prohibit that State from carrying out licensing procedures under this chapter; and
(b) Effect on Other States.—
A State (other than a State subject to an order under subsection (a)) may issue a non-resident commercial driver’s license to an individual domiciled in a State that is prohibited from such activities under subsection (a) if that individual meets all requirements of this chapter and the nonresident licensing requirements of the issuing State.
(c) Previously Issued Licenses.—