Go to the next page of the DBW website and after the line quoted is this one.
"The state regulations, from the California Air Resources Board (ARB) Recreational Marine Engine Program
, are concerned with the manufacture
and sale of NEW
marine gasoline two-stroke engines."
I have an 88hp 2 stroke on a runabout, not illegal to run but, difficult or illegal to buy one in the state new.
Explanation of Two-Stroke Vessel Engine Regulations and Restrictions
Pretty much thought when he received an estimate for installing a Honda, our mate might decide it was better to rebuild the inboard himself.