A police officer has the power to arrest any person whom the officer finds committing, or has reasonable cause to suspect of having committed, or being about to commit, an offence.
Loitering is an offence against public order under which a person may be arrested if they refuse or fail to state a satisfactory reason for being in a certain place when questioned by a police officer.
Similarly, urinating in public is an offence against decency and morality under which a person may be arrested if they urinate or defecate in a public place within a municipality or town, elsewhere than in premises provided for that purpose. The maximum penalty for this offence is $250 and an expiation fee of $80.
s 76 Summary Offences Act 1953
s 18 Summary Offences Act 1953
s 24 Summary Offences Act 1953