(2)Subject to such conditions as may be prescribed by the appropriate Government, a Social Security Organisation may, from time to time invest any moneys vested in it, which are not immediately required for expenses properly defrayable and may, subject to as aforesaid, from time to time re-invest or realise such investments:Provided that in case of Provident Fund, Pension Fund or Insurance Fund, such investment, re-investment or realisation shall be specified in the Provident Fund Scheme or Pension Scheme or Insurance Scheme, as the case may be.