13 Oath to be taken by persons exercising police functions
(1) Before a person exercises any of the functions of a police officer, the person must take the oath or make the affirmation of office as a police officer in accordance with the regulations.(2) A police officer is not required to take a further oath or make a further affirmation after a change in the officer’s position in the NSW Police Force, so long as the officer remains in the NSW Police Force.

Section 13