Treble hooks are a no-no for Halibut in all the local/coastal waters... At least that's my reading of this:

"Halibut - Hook and line angling and spearfishing
only. A hand-held line is permitted. Only one line
with up to two hooks may be used."
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The charm of fishing is that it is the pursuit of what is elusive but attainable, a perpetual series of occasions for hope. -John Buchan