9feeba01__RSPCA_Australia_knowledgebase__Relevant_Provision
[State] Victoria [Legal? (Yes/No)] No [Relevant Provision] 
Under section 9 of the Prevention of Cruelty to Animals Act 1986 (Vic), a person who carries out a prohibited procedure on an animal commits an act of cruelty upon that animal and is guilty of an offence. Under section 3, “prohibited procedure” includes docking a dog’s tail unless the procedure is done by a veterinary practitioner for the purpose of having a therapeutic effect on the dog.
Is the tail docking of dogs legal? - RSPCA Australia knowledgebase
Relevant Provision