Since the controversial withdraw from the Paris agreement, California has taken it upon themselves to sign an agreement with China to continue green technology development.

The Logan Act of 1799 states

Any citizen of the United States, wherever he may be, who, without authority of the United States, directly or indirectly commences or carries on any correspondence or intercourse with any foreign government or any officer or agent thereof, with intent to influence the measures or conduct of any foreign government or of any officer or agent thereof, in relation to any disputes or controversies with the United States, or to defeat the measures of the United States, shall be fined under this title or imprisoned not more than three years, or both.

This agreement between California and China 1) aims to influence the conduct of China with respects to economy and green initiative, and 2) aims to defeat the measures that the US government has put forth with our withdrawl from the Paris agreement.

How is this not a cut and dry case? California is overtly driving opposition against the United States government's agenda in an act of defiance with a foreign power. China none-the-less.

Is the agreement illegal and can Governor Jerry Brown be fined/imprisoned for this?