Cal. CIV § 800.85

(a) The management may require the right of prior approval of a purchaser of a floating home that will remain in the floating home marina and that the selling homeowner or his or her agent give notice of the sale to the management before the close of the sale. Approval cannot be withheld if the purchaser has the financial ability to pay the rent and charges of the floating home marina unless the management reasonably determines that, based on the purchaser’s prior tenancies, he or she will not comply with the rules and regulations of the floating home marina. In determining whether the purchaser has the financial ability to pay the rent and charges of the floating home marina, the management shall not require the purchaser to submit copies of any personal income tax returns in order to obtain approval for residency in the floating home marina. However, management may require the purchaser to document the amount and source of his or her gross monthly income or means of financial support. If the ownership or management rejects a purchaser as a prospective homeowner, the ownership or management shall inform the selling homeowner in writing of its reasons for the rejection. If the approval of a purchaser is withheld for any reason other than those stated in this article, the management or owner may be held liable for all damages proximately resulting therefrom.

(b) If the management collects a fee or charge from a prospective purchaser of a floating home in order to obtain a financial report or credit rating, the full amount of the fee or charge shall be credited toward payment of the first month’s rent for that floating home purchaser. If, for whatever reason, the prospective purchaser is rejected by the management, the management shall refund to the prospective purchaser the full amount of that fee or charge within 30 days from the date of rejection. If the prospective purchaser is approved by the management, but, for whatever reason, the prospective purchaser elects not to purchase the floating home, the management may retain the fee, or a portion thereof, to defray its administrative costs under this section.