Also to clarify the job post, it is 16 hours a week not 15. You do 8 and a half hours each night with a 30 min unpaid break. (30 mins is the bare minimum, normally longer than that).
The holidays is 15 days for NT Trains Ops, you get one extra lieu day for training (see below) so it's 16 days a year, or 8 weeks as you only use 2 days for a week off.
There is a week of full time training once a year which is Mon - Fri during the day which you would need to be available for. You get the previous weekend off and that weeks weekend off with another day owed to you.