Roymondo:
Far as I know you cannot opt-out of the 10 hour night working limit on an individual basis - the opt-out is a collective agreement which covers all workers in a given workplace.
Spot on, It doesn’t need to be every worker in a given workplace it just has to be a group of people, a group being everyone doing the same job, but your right that individuals doing the same job as the rest of the group cannot opt out by themselves.