What do I have to declare?
Firearms, weapons and ammunition
You must declare all firearms, weapons and ammunition including real and replica firearms and BB air guns that discharge a pellet by means of compressed gas, commonly purchased as "toy" guns. Other weapons such as paintball markers, blowpipes, all knives
, nunchukas, slingshots, crossbows, electric shock devices and knuckle dusters must also be declared. Some of these items may require a permit, police authorisation and safety testing before importation.
To answer your question... The knives can be brought in either your checked-in luggage or in your shipping container. The only place you cant take them is in your carry-on luggage. If you are going to put them in your checked-in luggage you will need to do two things, 1) get a clearance to do so from the airline and 2) declare them on arrival in Australia, the yellow arrival card that everyone fills in. So long as they are declared there should not be any problems, they may just want to have a look at them. If you put them in your shipping container all you will need to do is list them on the itemised register, along with all the other goods.