Except as otherwise provided by law, property of the judgment debtor that is not assignable or transferable is not subject to the enforcement of a money judgment. (CCP 695.030) However, the debtor’s rights in collateral may be voluntarily or involuntarily transferred (by way of sale, creation of a security interest, attachment, levy, garnishment or other judicial process) notwithstanding a provision in the security agreement prohibiting any transfer, but a provision in the security agreement making the transfer constitute a default is valid. (COMM 9401)