All proceedings relating to any order made or purported to be made under the principal Act pending immediately before the commencement of this Act, before any court, tribunal or other authority shall abate:
     Provided that this section shall not apply to the proceedings relating to section 11, 12, 13 ad 14 of the principal Act in so far as such proceedings are relatable to the land, possession of which has been taken over by the State Government or any person duly authorised by the State Government in this behalf or by the competent authority.