South Australian Current Acts South Australian Current Acts5—Proof of lawful authority and other matters
Subject to any provision to the contrary, where this Act provides that an act
done without lawful authority, without reasonable cause, without reasonable
excuse, without lawful excuse or without consent constitutes an offence, the
prosecution need not prove the absence of lawful authority, reasonable cause,
reasonable excuse, lawful excuse or consent, and the onus is upon the
defendant to prove any such authority, cause, excuse or consent upon which he
or she relies.