In fact, this is SAT internal issue the packaging was proposed and developed by SAT at the beginning, It should be handle by SAT. Is it correct ?
However,
I do understand so, here under is my suggestion.
Please provide the impact if HAC-AO not approve.
Advise SAT current situation and submit official proposal and countermeasure.
Test result (required) - - > some point is NG how do we improve etc....
Explanation with properly evident like you mentioned "specification in house use to sales to Australia ours part is 18 - 25 kgs"
other necessary info (if have)