Being a sole-trader contractor and not passing the '80/20 rule' (this rule checks whether one gets at least 20% of income from another source), the obligations are only to pay the three types of insurance. Agencies usually do this and it is useful to checks whether this amount (around 2-3%) has been already deducted from the agreed rate. The rest is contractor's gross amount, of which 9% must be paid to superannuation account.

Independent Contractors Australia contains resources for independent contractors (link).

Links in Australia