CA Civ Code Section 1997.270

(a)

Section 1997.260 applies to a restriction on use executed on or after January 1, 1992. If a restriction on use executed before January 1, 1992, requires the landlord’s consent for a change in use of leased premises by a tenant, but provides no standard for giving or withholding consent, the landlord has sole and absolute discretion to give or withhold consent.

(b)

For purposes of this section, if the terms of a restriction on change in use are fixed by an option or other agreement, the restriction on change in use is deemed to be executed on the date of execution of the option or other agreement.