Northern Territory Consolidated Acts Northern Territory Consolidated Acts53. Tenant must not alter locks
(1) A tenant must not, without reasonable excuse:
(a) alter or remove a lock or security device on the premises or ancillary property; or
(b) add a lock or security device to the premises or ancillary property,
without the consent of the landlord.
Penalty: 100 penalty units.
(2) A tenant who has altered or added a lock or security device on premises or ancillary property must, within 2 business days after the alteration or addition, provide to the landlord a key to the lock or security device.
Penalty: 20 penalty units.