§ 1270.9 States' responsibilities regarding compliance.
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) States are responsible for ensuring compliance with 23 U.S.C. 154 and this part.
(b) A State that has been determined to be in compliance with the requirements of 23 U.S.C. 154 and this part must promptly notify the appropriate NHTSA Regional Administrator in writing of any change or change in enforcement of the State's open container law, identifying the specific change(s).
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.