I don't know the rules at that ski area, but one near Nelson
BC I have been to used to allow, even sort of advertised, that
there is good skiing to be had in the nearby out of bounds
backcountry. Unlike most areas here in CA that make it a crime to
leave the boundry.

The couple is still responsible for their actions, but leaving
the area may not be viewed in the same way it is in other
locations. IE, leaving the bounds of the ski area is not a
mistake, getting lost is.

If officials ignore SEVERAL SOS', whats to say they won't ignore
a PLB?