Cal. Welf. & Inst. Code § 892
(a) From any state moneys made available to it for that purpose, the Youth Authority shall provide state assistance pursuant to this section to defray, in whole or part, the cost of construction of border check station facilities by any city which applies therefor.
“City” as used in this section means any city with a population in excess of 500,000 as determined by the last decennial census, all or part of the boundaries of which are contiguous with the boundaries of a foreign country adjoining this state.