If using rings and clips help you out, use them. They are not prohibited to use anywhere, including FFO areas.
Below is the CRFFO regulation from the PFBC site:
CATCH AND RELEASE FLY-FISHING ONLY
Open to fishing year-round (no closed season).
New-Fishing is permitted on a 24-hour basis.
No trout may be killed or had in possession.
Fishing may be done with artificial flies and streamers constructed of natural or synthetic materials, so long as all flies are constructed in a normal fashion on a single hook with components wound on or about the hook. Anything other than these items is prohibited.
Fishing must be done with tackle limited to fly rods, fly reels and fly line with a maximum of 18 feet in leader material or monofilament line attached. Spinning, spincast and casting rods and reels are prohibited.
The use or possession of any natural bait, fishbait, bait paste and similar substances, fish eggs (natural or molded), or any other edible substance is prohibited.
Taking baitfish or fishbait is prohibited.
Wading is permitted unless otherwise posted.
New-An angler in a boat may possess bait and fish caught in compliance with the seasons, sizes and creel limits in effect for a water from which it was taken, provided that the boat angler floats through the Catch and Release Fly-Fishing Only area without stopping or engaging in the act of fishing or the boat angler puts in or takes out his boat at an access point within the Catch and Release Fly-Fishing Only area.
A current trout/salmon permit (or Combination Trout/Salmon/Lake Erie permit) is required.