Interesting point...

Here's a quote regarding the non-bouyant lure restriction:

When a non-buoyant lure restriction is in
effect, anglers fishing with a non-buoyant lure
(one that sinks in freshwater) may only use a
lure that is equipped with one single hook
measuring ¾ " or less from point to shank.
When using a buoyant lure (one that floats in
freshwater) in an area with a non-buoyant lure
restriction, hooks must be attached to, or
below, but within 3” of the floating lure. (No
hook may be tied above the lure.) Weights
may not be attached below or less than 12”
above a buoyant lure. The single hook
restriction does not apply to a buoyant lure.

The rule is a bit ambiguous...

(a) if the combo of the pencil lead, leader, corkies, and two hooks is considered a non-buoyant lure COLLECTIVELY AS A WHOLE when fishing a NBLR river, then it appears that there is no restriction as to where the hook is placed relative to the corky, but it must be a single hook only.

(b) If the corky individually is considered the "buoyant lure", then it appears that the aforementioned double-hook set up is illegal in an NBLR river. "No hook may be tied above the lure."

I'd stick with a single hook, rigged traditionally below a corky, in an NBLR river--less potential hassles from the gamies and an adverse judge that way