Most California commercial leasing transactions use one of the AIR CRE Commercial Leases (“AIR Forms”) or the CAR Commercial Lease form (“CAR Form”). The AIR Forms are very inclusive at 20+ pages, are balanced for the landlord and tenant, but may not be the right choice for every commercial lease. The CAR Form is user friendly at 6 pages, but only covers the basics. The AIR CRE forms have specific leases for office, single, multi-tenant, ground leases and for shopping centers. AIR also offers addendums for arbitration, options to extend, rent adjustments, right of first refusal, etc. The primary difference between the AIR and CAR forms are detailed assignment of responsibility. Read my article published by the CLA (of the California State Bar Association) to answer your questions about the forms.