It means, it can't exist in the US.
<span>Mainly because the Constitution is the supreme law the US and anything that goes against any amendment in the Constitution is unconstitutional and therefore cannot exist as proposed.
From Dementiax on Yahoo Answers</span>
1700- the land was not very explored yet. There was a permanent mission in Baja California (today Mexico) but nothern California was claimed by Spanish, but not too explored yet.
1821- that's when Mexico had it, it's Mexico's independence year!
1846- In june and July- the California Republic!
1850- from September 9th it belonged to the States.