irregular appointments (not illegal appointments) as explained in S.V. Narayanappa [(1967) 1 SCR 128 : AIR 1967 SC 1071] , R.N. Nanjundappa [(1972) 1 SCC 409 : (1972) 2 SCR 799] and B.N. Nagarajan [(1979) 4 SCC 507 : 1980 SCC (L&S) 4 : (1979) 3 SCR 937] and referred to in para 15 above, of duly qualified persons in duly sanctioned vacant posts might have been made and the employees have continued to work for ten years or more but without the intervention of orders of the courts or of tribunals. The question of regularisation of the services of such employees may have to be considered on merits in the light of the principles settled by this Court in the cases abovereferred to and in the light of this judgment. In that context, the Union of India, the State Governments and their instrumentalities should take steps to regularise as a one-time measure, the services of such irregularly appointed, who have worked for ten years or more in duly sanctioned posts but not under cover of orders of the courts or of tribunals and should further ensure that regular recruitments are undertaken to fill those vacant sanctioned posts that require to be filled up, in cases where temporary employees or daily wagers are being now employed. The process must be set in motion within six months from this date. We also clarify that regularisation, if any already made, but not sub judice, need not be reopened based on this judgment, but there