The lessee shall not sell or otherwise transfer his/her rights in the site or part thereof for period of 10 years from the date of allotment of the dwelling unit by the Chandigarh Hous ing Board, but, forthe land allotted for die Cornmcrcial/Institutional/Industrial pur poses this ban on transfer will be for a period of 15 years from the date of comple tion of the building. After the expity of this period, the lessee may be allowed by the Government to sell or transfer his/her rights in the site to any other party subject to the condition that 50% (fifty per cent) of the unearned increase in the value of land at the time the site is sold or transferred shall be payable to the Chandigarh Administration before registering such sale or transfer. The value of the property for this purpose shall be assessed by theEstate Officer or any other authority which may be appointed by the Chief Administrator whose decision shall be final and binding on the lessee:
Provided that the Administrator may permit transfer of a commercial site/ and industrial plot prior to the expiry of the period of 15 years on the ground of exceptionable hardship. Such permission shall, however, be subject to the other conditions mentioned in this clause.