Section 7. Right to enhance rent by suit

7. (1) Notwithstanding anything contained in any contract or custom, it shall be lawful for landlord of any land in relation to which a right of Zare Chaharum existed on the 24th day of August, 1951, to enhance by suit the rent payable therefore on the day aforesaid: Provided firstly, that the enhancement is not more than 33 1/3 percentum of such rent : Provided secondly, that no enhancement shall be allowed if the landlord is proved to have at any time realized any amount on account of Zare Chaharum in respect of any house or a building standing on the land : (2) Where rent payable for any land has been enhanced under sub-section (1) it shall not be enhanced a second time until the period of thirty-three years has expired from the date on which the enhancement takes effect.