Any order altering the remuneration and the other terms and conditions of service of the employees referred to in sub-section (2) of section 11 of the principal Act made or purporting to have been made under that subsection before the commencement of this Act by the Central Government for any of the purposes specified in that sub-section as amended by this Act, shall, notwithstanding anything contained in any judgment, decree or order of any court, be deemed to have been made under that sub-section as amended by this Act as if this Act were in force on the date on and from which the order was intended to take effect, and the order shall continue in force and have effect accordingly, unless and until superseded by anything done or action taken under the principal Act.