There are also two NVFR ratings in AU, don't get the ag one or you will not be able to operate NVFR on multi engine charter ops.
See below for NVFR Ag requirements. You would be unlikely to choose the wrong one by mistake.
CAO 40.2.2
1 AERONAUTICAL EXPERIENCE
1.1 For the purposes of subparagraph 6A.1 (c), the aeronautical experience must include at least 500 hours of flight time as pilot in command, or as pilot acting in command under supervision, of an aeroplane that is engaged in spraying operations conducted in daylight.
1.2 For the purposes of subparagraph 6A.2 (c), the aeronautical experience must include at least 500 hours of flight time as pilot in command, or as pilot acting in command under supervision, of an aeroplane, or a helicopter, that is engaged in spraying operations conducted in daylight.