High Power Committee clearance required - appeals may be filed to save limitation but must be referred promptly for suspension. Before instituting litigation involving Government Departments and Public Sector Undertakings, every endeavour must be made to obtain clearance from the High Power Committee; appeals may be filed to save limitation but where filed without prior clearance the appellant must within one month refer the matter to the Committee and serve prior notice on the Under Secretary (Coordination) in the Cabinet Secretariat. The reference is effective only after lodging that notice, and once made the operation of the challenged order or proceedings is suspended pending the Committee's decision; if unresolved, the Committee must record reasons and grant clearance for litigation.