Notice of enhancement to be served through Revenue-officer.

    When a landlord wishes to enhance the rent of an ordinary tenant whose holding does not consist entirely of sir-land and whose rent is not fixed by an agreement in writing, and the tenant does not agree to the enhancement, the landlord may cause to be served on the tenant through a Revenue-officer a notice of the enhancement not less than six months or more than twelve months before the commencement of the agricultural year in which the landlord desires the enhancement to take effect.