The United States Congress passes, and the President signs, a bill into law with the following language.

"It shall be unlawful for dog owners to transport dogs on public highways without placing them in a secure pet carrier."

The State of California has an existing law in place that says:

"Drivers in the State may be accompanied by a bona fide emotional support dog while driving on public highways. Such support dog does not need to be placed in a safety restraint or pet carrier while in the vehicle."

Based on the material covered in our classes, is the State law valid? Explain your answer.