The way I read it...No Exposed Bait while trapping, that's the law.
Bait Stations are spots where bait & lure is placed in a hole or depression, then covered with dirt or nearby debris. Buried bait will attract predators if placed in the right locations. Place bait stations to your advantage. Meaning, on a travel route or stalling out area where predator feels comfortable.
My area, certain Groundhog holes are prime bait station locations. Maintaining bait stations is a lot of work.
Cable Restraints & Bait Stations
In my area, bait stations seem to work best during extreme weather conditions. As in extended cold or extended deep snow cover.
Predators will visit or pass nearby, but may never actually eat during most of the year. I reason because they have an full stomach most of the time. But they do visit and this keeps them in the vicinity for trapping/predator calling season.
Using Cable Restraints (CR) with bait stations I've had problems. One was total avoidance from Coyotes. I learned I was setting too close to the prize. As Coyotes drew closer, they were more cautious and found me out. Dang.
As I hung more CR's further from bait I caught Coyotes. I set 100-200 yds. from bait.
Let me point out, CR's are designed to catch an animal while it's trotting and traveling in a natural manner. No bait or lure is used, it's strictly a blind set, on a travel way. We want animal to keep moving as it passes through the loop.
Before CR's in Pa. I used foothold traps to blind set predators with bait station. One method I used was a hanging bait station.
I placed tainted meat or fresh fish & call lure in a sock, tied off with long cord. I would hang over branch or wedge in crotch of tree branch above ground 6'-8'. Predators head & nose was raised so footholds are effective. This same method I still use today with CR's, but set further back on approach.
In Pa., keep your bait covered.