New States may be admitted by Congress into this Union, but no new State shall be formed or erected within the Jurisdiction of any other State, nor any State be formed by the Junction of two or more States, or Parts of States, without the consent of the Legislatures of the States concerned as well as of the Congress.
If this is read literally the referendum won't work because the CA legislature will have to consent. Then Congress will also have to consent. Fat chance for all of that happening.
Agreed. Obviously, constitutional illiterates wrote this measure. There is no way this hare brained scheme makes it through all the necessary hurdles.