Our fleet of 737s, -600 to -800, come from a host of backgrounds
That's fine and I presume the boffins comply with whatever rules apply in your case. For Oz, the rules are at
https://www.legislation.gov.au/Details/F2018C00475. 600kg would be a tad big for us, I fear.
Due to custom regulations
Sleight of hand and magic are the things which spring to mind ...
I would guess it's regularly in the order of 500 kg
Putting any customs considerations to one side, one hopes that the weight realities are accounted somewhere ?
I can not think of anyone serving hard time for faking a loadsheet.
I suspect that in most jurisdictions censure would be rather significant ...
Flying a 737 that is not particularly sensitive to either weight or balance helps
Although my 73 stick time is dated, I wouldn't have thought so.
He had a short meeting with the Ops Manager, Old Cpt A, and that problem was no more.
Interesting thoughts .. ?