Not quite sure where you get the information from but there is such a thing as a load control licence.
Many major airlines who have Handlers doing their loadsheets put staff from the GHA through their own Licensing procedure and issue licences which will involve an exam for each aircraft type.
A few examples are:
Malaysian
Gulf Air
Etihad
Air India
Jet Airways
South African Airways
Air China
China Eastern
Oman Air
Qatar Airlines
Royal Brunei
And no doubt there are countless others