A person must not obstruct, threaten, abuse, insult or intimidate—
(a) an officer of an Authority in the execution of his or her duty under this Act; or
(b) any person lawfully performing duties under this Act, whether or not for or on behalf of an Authority; or
(c) any person lawfully assisting an officer of an Authority in the execution of his or her duty under this Act.
Penalty: 20 penalty units.