9feeba01__RSPCA_Australia_knowledgebase__Relevant_Provision
[State] Northern Territory [Legal? (Yes/No)] No [Relevant Provision] 
Section 9 of the Animal Welfare Act (NT) provides that a person commits an offence if the person is cruel to an animal. Amongst other things, cruelty includes causing an animal unnecessary suffering or failing to take reasonable action to mitigate an animal’s suffering after the person caused it unnecessary suffering, even if the suffering was caused by accident.
Is the tail docking of dogs legal? - RSPCA Australia knowledgebase
Relevant Provision