'Old System' cases:
The timeframe is diff with diff CHCs. However, generally 2006 & 2007 files r under process in most CHCs. London has started calling for meds of 2007 files [early 2007 ones have got their PPRs too].
Some 2003 files r also in line [especially in ND], but those r unusual cases, with b/ground and/or security issues.