I recently used the ’08 CAR form “Lease or month to month rental agreement”.They are still issuing this version at the local board. It says, “Tenant shall vacate the premises upon termination of the agreement,unless (i) landlord and tenant have extended this agreement in writing or signed a new agreement(ii) mandated by local rent control law: or (iii) Landlord accepts rent from tenant(other than past due rent)…
From this I don’t interpret an automatic extension requiring 30 days notice to be the law. But It will be interesting to watch this thread. Don’t know if it is legal to have an agreement including an automatic extension currently but I have had lease contracts in the past that convert automatically to month-to-month terms upon expiration of the lease. In the case of the op I would look for that kind of language in the contract.