The landlord must give the tenant at least a two day notice of his intent to enter at reasonable times. However, the law says tenants must not unreasonably refuse to allow the landlord to enter the rental where the landlord has given at least one day's notice to enter at a specified time in order to show the dwelling to prospective or actual purchasers or tenants.
Any provision in a rental agreement that allows the landlord to enter without such notices is not valid under the law. The law says that tenants shall not unreasonably refuse the landlord access to repair, improve, or service the dwelling.
In case of emergency, or if the property has been abandoned, the landlord can enter without notice.