Consider a scenario where a room is rented in a house with little or no formal contract obligation (one month notice on either side) and it is month-to-month. The renter is basically a guest who pays rent and can leave at any time but the landlord can kick them out whenever (s)he wants too.
If the verbal agreements stipulates a one month notice for departure on either side, can the landlord legally increase the rent effective one month from the notice so that the tenant still has another month at the old rent to look for another place to live if they don't like the new rent?