(1) Where the rent of a tenancy is the whole or a share of the land-revenue thereof, with or without an addition in money, kind or service, and the land-revenue of the holding in which the tenancy is situate is altered, a Revenue-officer having authority under section 56 of the Punjab Land-revenue Act, 1887 (XVII of 1887), to determine the land-revenue payable in respect of the several holdings comprised in the estate in which the tenancy is situate shall determine also the amount of the land-revenue of the tenancy, or the proportionate share thereof, payable by the tenant as rent.
    (2) Where an addition referred to in sub-section (1) is a percentage fixed with reference to the land-revenue of the tenancy, or the whole or a share of the rates and cesses chargeable thereon, or both, the Revenue-officer shall in like manner from time to time alter the amount of the addition in proportion to any alteration of such land-revenue or rates and cesses.
    (3) The sum or sums determined under the foregoing sub-sections, together with any addition previously payable other than the additions referred to in sub-section (2), shall be the rent payable in respect of the tenancy until there is again an alterations of the land-revenue thereof or of the rates and cesses chargeable thereon or until the rent is enhanced by a suit under this Act.
    (4) An alteration of rent under this section shall not be deemed an enhancement or reduction of rent within the meaning of this Act.