California Code, Civil Code - CIV § 1803.9

If it is explicitly understood between the seller and the buyer that all or any part of the cash price will be paid from the proceeds of a loan to be obtained by the buyer from a third party, the contract of sale or purchase order may be rescinded at the election of the buyer, and all considerations thereupon shall be returned by the respective parties without further demand, if the buyer is unable to obtain such third-party financing upon reasonable terms after having made a reasonable effort to obtain it, and buyer notifies the seller of the rescission within three business days.