Taken directly from the QLD transport ADR guide:
http://www.transport.qld.gov.au/qt/LTASinf...%20_Feb2004.pdf
Steering wheels must be at least 350mm in diameter and must not be more than 26mm
smaller than the original steering wheel.
Queensland Transport will accept products with the following brand names:
Momo, Australi, ET, SAAS, Autotechnica, Formuling and OBA.
Your momo steering wheel is legal provided, ur car didn't come standard with an airbag steering wheel and the diameter is not smaller than 350mm.
Good luck!