Cal. Sts. & Hy. Code § 1168
If the board finds that the boundaries thus established for such division are incorrectly described, it shall direct the county surveyor to ascertain and report a correct description of the boundaries in conformity with the orders of the board. At the first regular meeting of the board after the filing of the county surveyor's report, the board shall cause to be published, in the manner authorized by section 1196, a notice that the report will be considered at the next regular meeting of the board, stating the day. At the appointed meeting the board shall ratify the report of the surveyor, with such modifications as the board considers necessary. The boundaries established pursuant to this section shall be the legal boundaries of the division.
Ca. Sts. and High. Code § 1168