Absolutely! This is a not-uncommon question; fortunately, it is spelled out in section 7.27 of the SFARMLS Rules & Regulations. Specifically,
Any reference in a listing to any on-site parking rights that seller represents exist and are transferable to a buyer in connection with the sale of the listed property must also refer to the recorded source of such rights, including CC&Rs, subdivision map/plan, easement, grant deed, cooperative lease, memo of TIC agreement, or other recognized instrument.
The following are entirely excluded from any listing, with the exception of a short descriptive reference in Public Remarks and/or Private Remarks: (a) any type of off-site parking lease, license or other agreement, if not recorded; (b) any unrecorded on-site lease, license or other agreement; (c) any oral agreement; and (d) any recorded lease, license or other written agreement that expires over time, which is terminable upon breach, assignment, sublease or other transfer, or which is otherwise revocable in whole or in part by the lessor.