AUTHORITY: section 643.050, RSMo 1994. Original rule filed March 14, 1967, effective March 24, 1967. Rescinded Filed Feb. 28, 2002, effective Nov. 30, 2002. Op. Atty. Gen. No. 331, Shell (11-15-71). The state of Missouri has the authority to inspect for “air pollution control devices” which may be installed on motor vehicles as a requirement to comply with applicable emission regulations, but whether the regulations and inspections would accomplish the purpose of “enforcing compliance with applicable emission standards” which are federal standards, and whether the preemption provision of 42 U.S.C.A., Section 1857f-6a, has been complied with are questions that only the appropriate federal officials can answer.