(4)Notwithstanding anything in this section, but subject to any other provision of this Act, Acts of the appropriate Legislature in India may regulate the conditions of service of persons serving His Majesty in a civil capacity in India, and any rules made under this section shall have effect subject to the provisions of any such Act :Provided that nothing in any such Act shall have effect so as to deprive any person of any rights required to be given to him by the provisions of the last preceding subsection.