What facility is provided to the Inquiring Authority for expeditious completion of the proceedings?

What facility is provided to the Inquiring Authority for expeditious
completion of the proceedings?
DoP&T OM No. 142/5/2003-AVD.I dated 6.4.2004 provides that Inquiring Authority
may be relieved of normal duties for 20 days in two spells for timely completion of
inquiry.