Section 9. Purchasers or lessees to executing undertaking.

Notwithstanding anything contained in any law for the time being in force, a person acquiring an apartment from an apartment owner by gift, exchange, purchase or otherwise or taking lease' of an appointment from an apartment owner, shall- (a) in respect of the said apartment, be subject to the provisions of this Act; and (b) execute within four months and register an instrument, in such form and in such manner as may be prescribed, giving an undertaking to comply with the covenants, conditions and restrictions, subject to which such apartment is owned by the apartment owner aforesaid, and file certified copy thereof in the office of the competent authority.