Whenever a new federal census is taken, the counties are not by operation of law reclassified under such census, but remain in the old classification until reclassified by the Legislature.
Cal. Gov. Code § 28085
Classification of Counties
Added by Stats. 1947, Ch. 424.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.