tomnofagam,
An easy question but we need some more information. Serial number and empty CG for starters.
Milt,
You've not been about all that much in recent times. Hopefully things are well with you ?
Standard weight either will be from a locally derived statistical sampling exercise or, for Oz,
CAAP 235-1(1).
The loading strategy probably was driven by consideration of congestion up front were all to enter via the front door. Normal protocol requires a check of the empty CG to keep the varying number forward of the critical FS for tipping plus a pad for mum and the kids.