Notwithstanding any other provision of law, a lease agreement which pertains to the commercial use of a motor vehicle or trailer and which includes a terminal rental adjustment clause does not create a sale or security interest merely because the terminal rental adjustment clause provides that the rental price is permitted or required to be adjusted under the agreement either upward or downward by reference to the actual value of the motor vehicle or trailer upon lease termination or sale or other disposition of the motor vehicle or trailer. Actual value shall be determined as agreed upon by the parties. This section is not applicable to a consumer lease agreement pertaining to a motor vehicle or trailer leased or used primarily for personal, family or household purposes.