California Code, Government Code - GOV § 56107

(a) This division shall be liberally construed to effectuate its purposes.  No change of organization or reorganization ordered under this division and no resolution adopted by the commission making determinations upon a proposal shall be invalidated because of any defect, error, irregularity, or omission in any act, determination, or procedure which does not adversely and substantially affect the rights of any person, city, county, district, the state, or any agency or subdivision of the state.

(b) All determinations made by a commission under, and pursuant to, this division shall be final and conclusive in the absence of fraud or prejudicial abuse of discretion.

(c) In any action or proceeding to attack, review, set aside, void, or annul a determination by a commission on grounds of noncompliance with this division, any inquiry shall extend only to whether there was fraud or a prejudicial abuse of discretion.  Prejudicial abuse of discretion is established if the court finds that the determination or decision is not supported by substantial evidence in light of the whole record.