The actual Experimental halt needs to b in the period of 3-6 months by RB.
IF the stop does well in short period, then they are converted into regular halts.
But if they fail to attract minimum required, RB can remove it.
Now a days, RB can't remove due to pressure by public.
But...
more... some halts can removed easily.
Similarly, some halts are politically enforced ones, so RB can remove them later and if needed, they'll re-add back if next minister requests or RB sees the pax for it.