Northern Territory Numbered Regulations Northern Territory Numbered Regulations(1) For section 6(1)(b) of the Act, a thing that falls within a category of non-ionising radiation apparatus in the National Directory, Schedule 2, is a radiation source.
(2) For section 6(3)(b) of the Act:
(a) the activity or activity concentration for a radioactive material is the activity or activity concentration in the National Directory, Schedule 4, for the material; or
(b) the activity or activity concentration for radioactive material that is a mixture of radioactive materials is the activity or activity concentration in the National Directory, Schedule 4, for each of the materials.