(1) The Indo-Tibetan Border Police Force in existence at the commencement of this Act shall be deemed to be the Force constituted under this Act.
     (2) The members of the Indo-Tibetan Border Police Force in existence at the commencement of this Act shall be deemed to have been appointed or, as the case may be, enrolled as such under this Act.
     (3) Anything done or any action taken before the commencement of this Act in relation to the constitution of the Indo-Tibetan Border Police Force referred to in sub-section (1), in relation to any person appointed or enrolled, as the case may be, thereto, shall be as valid and as effective in law as if such thing or action was done or taken under this Act:
     Provided that nothing in this sub-section shall render any person guilty of any offence in respect of anything done or omitted to be done by him before the commencement of this Act.